Merge branch 'jn/auto-depend-workaround-buggy-ccache'

An age-old workaround to prevent buggy versions of ccache from
breaking the auto-generation of dependencies, which unfortunately
is still relevant because some people use ancient distros.

* jn/auto-depend-workaround-buggy-ccache:
  Makefile: explicitly set target name for autogenerated dependencies

diff --cc Makefile
Simple merge