Log Message:
ccached: updated to 3.4.2

ccache 3.4.2

Bug fixes:

The cleanup algorithm has been fixed to not misbehave when files are removed by \ 
another process while the cleanup process is running. Previously, too many files \ 
could be removed from the cache if multiple cleanup processes were triggered at \ 
the same time, in extreme cases trimming the cache to a much smaller size than \ 
the configured limits.

Correctly hash preprocessed headers located in a “.gch directory”. \ 
Previously, ccache would not pick up changes to such precompiled headers, \ 
risking false positive cache hits.

Fixed build failure when using the bundled zlib sources.

ccache 3.3.5 added a workaround for not triggering Clang errors when a \ 
precompiled header’s dependency has an updated timestamp (but identical \ 
content). That workaround is now only applied when the compiler is Clang.

Made it possible to perform out-of-source builds in dev mode again.