Patches for ccache on Minerva

0001-Do-not-define-ESTALE-in-config.h.in.patch

Do not define ESTALE in config.h.in

In ccache, config.h is included by the -include compiler option, which means that it is included before any libc headers. This doesn't cause any problems on systems that redefine this macro when libc headers are included, but on Minerva, it breaks our definition of the ErrnoCode enum.