Modify lldb_suite.py to enable python debugging

Summary:
pudb and pdb interfere with the behavior of the inspect module. calling
`inspect.getfile(inspect.currentframe())` returns a different result
depending on whether or not you're in a debugger. Calling
`os.path.abspath` on the result of `inspect.getfile(...)` normalizes the
result between the two environments.

Patch by Nathan Lanza <lanza@fb.com>

Differential Revision: https://reviews.llvm.org/D49620

llvm-svn: 338923

lldb/test/use_lldb_suite.py

@@ -4,7 +4,9 @@ import sys
 
 
 def find_lldb_root():
-    lldb_root = os.path.dirname(inspect.getfile(inspect.currentframe()))
+    lldb_root = os.path.dirname(
+        os.path.abspath(inspect.getfile(inspect.currentframe()))
+    )
     while True:
         lldb_root = os.path.dirname(lldb_root)
         if lldb_root is None: