Log Message:
ccache: Update to 3.7.2

Bug fixes

* The compiler option -gdwarf* no longer forces “run_second_cpp = true”.
* Added verification that the value passed to the -o/--set-config option
  is valid.
* Fixed detection of precompiled headers in the depend mode.
* Bail out on too hard Clang option -ftime-trace.
* ccache now updates the correct stats file when adding/updating manifest
  files.
  This bug previously made the file and size statistics counters incorrect
  over time.
* Fixed warnings from Clang about unused arguments during preprocessing.
* Unknown manifest versions are now handled gracefully in --dump-manifest.
* Fixed make check with “funny” locales.

Documentation

* Added a hint about not running autogen.sh when building from a release
  archive.
* Mention that xsltproc is needed when building from the source repository.