main/ccache: enable tests on s390x again
Test failure has been "fixed" upstream in 4.8.
See: https://github.com/ccache/ccache/commit/dfb3111f71ea19e7d2c3aaf161ba96a44e2af155
Test failure has been "fixed" upstream in 4.8.
See: https://github.com/ccache/ccache/commit/dfb3111f71ea19e7d2c3aaf161ba96a44e2af155