Renormalize line endings whitespace only after dccebddb3b

Line ending policies were changed in the parent, dccebddb3b. To make
it easier to resolve downstream merge conflicts after line-ending
policies are adjusted this is a separate whitespace-only commit. If you
have merge conflicts as a result, you can simply `git add --renormalize
-u && git merge --continue` or `git add --renormalize -u && git rebase
--continue` - depending on your workflow.

lldb/test/API/python_api/debugger/Makefile

@@ -1,3 +1,3 @@
-CXX_SOURCES := main.cpp
-
-include Makefile.rules
+CXX_SOURCES := main.cpp
+
+include Makefile.rules