ccache: upgraded package to upstream

Upgraded dev-util/ccache to version 3.7.6 on amd64

BUG=chromium:1040578
TEST=build_packages --board=eve --nousepkg

Change-Id: I310c6117599a9d29be691e7c3bc37521dbf09724
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2001557
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Commit-Queue: Alex Klein <saklein@chromium.org>
Tested-by: Alex Klein <saklein@chromium.org>
3 files changed