Adjust documentation for git migration.

This fixes most references to the paths:
 llvm.org/svn/
 llvm.org/git/
 llvm.org/viewvc/
 github.com/llvm-mirror/
 github.com/llvm-project/
 reviews.llvm.org/diffusion/

to instead point to https://github.com/llvm/llvm-project.

This is *not* a trivial substitution, because additionally, all the
checkout instructions had to be migrated to instruct users on how to
use the monorepo layout, setting LLVM_ENABLE_PROJECTS instead of
checking out various projects into various subdirectories.

I've attempted to not change any scripts here, only documentation. The
scripts will have to be addressed separately.

Additionally, I've deleted one document which appeared to be outdated
and unneeded:
  lldb/docs/building-with-debug-llvm.txt

Differential Revision: https://reviews.llvm.org/D57330

llvm-svn: 352514
diff --git a/llvm/docs/CompileCudaWithLLVM.rst b/llvm/docs/CompileCudaWithLLVM.rst
index 95d6b0d..6e181c8 100644
--- a/llvm/docs/CompileCudaWithLLVM.rst
+++ b/llvm/docs/CompileCudaWithLLVM.rst
@@ -143,9 +143,9 @@
 ----------------------------
 
 In clang, ``math.h`` and ``cmath`` are available and `pass
-<https://github.com/llvm-mirror/test-suite/blob/master/External/CUDA/math_h.cu>`_
+<https://github.com/llvm/llvm-test-suite/blob/master/External/CUDA/math_h.cu>`_
 `tests
-<https://github.com/llvm-mirror/test-suite/blob/master/External/CUDA/cmath.cu>`_
+<https://github.com/llvm/llvm-test-suite/blob/master/External/CUDA/cmath.cu>`_
 adapted from libc++'s test suite.
 
 In nvcc ``math.h`` and ``cmath`` are mostly available.  Versions of ``::foof``
diff --git a/llvm/docs/LibFuzzer.rst b/llvm/docs/LibFuzzer.rst
index 0737fbb..4852a47 100644
--- a/llvm/docs/LibFuzzer.rst
+++ b/llvm/docs/LibFuzzer.rst
@@ -544,7 +544,7 @@
 Currently, there is no simple way to run both fuzzing engines in parallel while sharing the same corpus dir.
 
 You may also use AFL on your target function ``LLVMFuzzerTestOneInput``:
-see an example `here <https://github.com/llvm-mirror/compiler-rt/tree/master/lib/fuzzer/afl>`__.
+see an example `here <https://github.com/llvm/llvm-project/tree/master/compiler-rt/lib/fuzzer/afl>`__.
 
 How good is my fuzzer?
 ----------------------
@@ -741,7 +741,7 @@
 .. _AddressSanitizer: http://clang.llvm.org/docs/AddressSanitizer.html
 .. _LeakSanitizer: http://clang.llvm.org/docs/LeakSanitizer.html
 .. _Heartbleed: http://en.wikipedia.org/wiki/Heartbleed
-.. _FuzzerInterface.h: https://github.com/llvm-mirror/compiler-rt/blob/master/lib/fuzzer/FuzzerInterface.h
+.. _FuzzerInterface.h: https://github.com/llvm/llvm-project/blob/master/compiler-rt/lib/fuzzer/FuzzerInterface.h
 .. _3.7.0: http://llvm.org/releases/3.7.0/docs/LibFuzzer.html
 .. _building Clang from trunk: http://clang.llvm.org/get_started.html
 .. _MemorySanitizer: http://clang.llvm.org/docs/MemorySanitizer.html
diff --git a/llvm/docs/TestSuiteGuide.md b/llvm/docs/TestSuiteGuide.md
index 0d9bbac..d23b383 100644
--- a/llvm/docs/TestSuiteGuide.md
+++ b/llvm/docs/TestSuiteGuide.md
@@ -27,7 +27,7 @@
 2. Check out the `test-suite` module with:
 
    ```bash
-   % svn co http://llvm.org/svn/llvm-project/test-suite/trunk test-suite
+   % git clone https://github.com/llvm/llvm-test-suite.git test-suite
    ```
 
 3. Create a build directory and use CMake to configure the suite. Use the
diff --git a/llvm/docs/TestSuiteMakefileGuide.rst b/llvm/docs/TestSuiteMakefileGuide.rst
index dfd12d7..246da55 100644
--- a/llvm/docs/TestSuiteMakefileGuide.rst
+++ b/llvm/docs/TestSuiteMakefileGuide.rst
@@ -14,14 +14,14 @@
 
 To run the test suite, you need to use the following steps:
 
-#. ``cd`` into the ``llvm/projects`` directory in your source tree.
 #. Check out the ``test-suite`` module with:
 
    .. code-block:: bash
 
-       % svn co http://llvm.org/svn/llvm-project/test-suite/trunk test-suite
+       % git clone https://github.com/llvm/llvm-test-suite.git test-suite
 
-   This will get the test suite into ``llvm/projects/test-suite``.
+#. FIXME: these directions are outdated and won't work. Figure out
+   what the correct thing to do is, and write it down here.
 
 #. Configure and build ``llvm``.
 
diff --git a/llvm/docs/TestingGuide.rst b/llvm/docs/TestingGuide.rst
index 6f24c9d..9908d57 100644
--- a/llvm/docs/TestingGuide.rst
+++ b/llvm/docs/TestingGuide.rst
@@ -165,15 +165,9 @@
 Debugging Information tests
 ---------------------------
 
-To run debugging information tests simply checkout the tests inside
-clang/test directory.
-
-.. code-block:: bash
-
-    % cd clang/test
-    % svn co http://llvm.org/svn/llvm-project/debuginfo-tests/trunk debuginfo-tests
-
-These tests are already set up to run as part of clang regression tests.
+To run debugging information tests simply add the ``debuginfo-tests``
+project to your ``LLVM_ENABLE_PROJECTS`` define on the cmake
+command-line.
 
 Regression test structure
 =========================