[Docs] Update libc++ target names after r279675.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@279940 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3d35be9..a76f34b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,7 +34,7 @@
 if (LIBCXX_STANDALONE_BUILD AND NOT LLVM_FOUND)
   message(WARNING "UNSUPPORTED LIBCXX CONFIGURATION DETECTED: "
                   "llvm-config not found and LLVM_PATH not defined.\n"
-                  "Reconfigure with -DLLVM_CONFIG=path/to/llvm-config "
+                  "Reconfigure with -DLLVM_CONFIG_PATH=path/to/llvm-config "
                   "or -DLLVM_PATH=path/to/llvm-source-root.")
 endif()
 
diff --git a/docs/BuildingLibcxx.rst b/docs/BuildingLibcxx.rst
index 6709352..26fa2a4 100644
--- a/docs/BuildingLibcxx.rst
+++ b/docs/BuildingLibcxx.rst
@@ -49,7 +49,7 @@
    For more information about configuring libc++ see :ref:`CMake Options`.
 
    * ``make cxx`` --- will build libc++ and libc++abi.
-   * ``make check-libcxx check-libcxxabi`` --- will run the test suites.
+   * ``make check-cxx check-cxxabi`` --- will run the test suites.
 
    Shared libraries for libc++ and libc++ abi should now be present in llvm/build/lib.
    See :ref:`using an alternate libc++ installation <alternate libcxx>`
@@ -60,7 +60,7 @@
    careful not to replace it. Remember Use the CMake option ``CMAKE_INSTALL_PREFIX`` to
    select a safe place to install libc++.
 
-   * ``make install-libcxx install-libcxxabi`` --- Will install the libraries and the headers
+   * ``make install-cxx install-cxxabi`` --- Will install the libraries and the headers
 
    .. warning::
      * Replacing your systems libc++ installation could render the system non-functional.