`findFilesWithExtension` helper checks for `endswith(extension)` instead of
exactly matching the file extension. This causes it to match unrelated files,
for example, `.profdata` files while matching `.fdata` files:
http://157.230.108.44:8011/#/builders/56/builds/247
```
Merging data from /worker/worker/bolt-x86_64-ubuntu-clang-bolt-gcc/build/tools/clang/prof.fdata.1124569.fdata...
Merging data from /worker/worker/bolt-x86_64-ubuntu-clang-bolt-gcc/build/tools/clang/test/Frontend/Output/optimization-remark-with-hotness-new-pm.c.tmp.profdata...
```
Reviewed By: phosek
Differential Revision: https://reviews.llvm.org/D141342
filenames = []
for root, dirs, files in os.walk(path):
for filename in files:
- if filename.endswith(extension):
+ if os.path.splitext(filename)[1] == extension:
filenames.append(os.path.join(root, filename))
return filenames