Joseph Benden authored Jul 20, 2019 and Natanael Copa committed Sep 30, 2019

This introduces basic support for ccache, during packaging builds.

If you are building many packages, it is recommended to manually
increase the maximum size of the ccache cache. This is typically
achieved by modifying `~/.ccache/ccache.conf` and adjusting the
`max_size` setting.

Signed-off-by: Joseph Benden <joe@benden.us>