Add a new attribute self.lldbHere, representing the fullpath to the 'lldb' executable
built locally from the source tree.  This is distinguished from self.lldbExec, which
can be used by test/benchmarks to measure the performances against other debuggers.

You can use environment variable LLDB_EXEC to specify self.lldbExec to the dotest.py
test driver, otherwise it is going to be populated with self.lldbHere.

Modify the regular tests under test dir, i.e., not test/benchmarks, to use self.lldbHere.
Also modify the benchmarks tests to use self.lldbHere when it needs an 'lldb' executable
with debug info to do the performance measurements.


git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@138608 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/lldbtest.py b/test/lldbtest.py
index 314f788..1c158a0 100644
--- a/test/lldbtest.py
+++ b/test/lldbtest.py
@@ -475,6 +475,12 @@
 
         if "LLDB_EXEC" in os.environ:
             self.lldbExec = os.environ["LLDB_EXEC"]
+        else:
+            self.lldbExec = None
+        if "LLDB_HERE" in os.environ:
+            self.lldbHere = os.environ["LLDB_HERE"]
+        else:
+            self.lldbHere = None
 
         # Assign the test method name to self.testMethodName.
         #