Michael Marineau 64fe678e86 coreos-kernel: re-enable ccache path rewriting for kernel builds
The current kernel build process expects ccache to be effective but
since setting CCACHE_BASEDIR globally was reverted in 35d8b34a builds
have been uncached any time the source revision changes.

Until it is safe to set CCACHE_BASEDIR globally again we should at least
make use of it for kernel builds.
2015-08-27 13:53:06 -07:00
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