Remove unnecessary executable bit on source files This was causing the presubmit to error. TEST=Build with `cros_workon_make` BUG=none Change-Id: I38a30256aef6481cc300d4dddb6c48dca5e8396c Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/libevdev/+/1978149 Tested-by: Harry Cutts <[email protected]> Auto-Submit: Harry Cutts <[email protected]> Reviewed-by: Sean O'Brien <[email protected]> Commit-Queue: Harry Cutts <[email protected]>