compiler_wrapper: disable ccache during src_configure

This seems to speed things up in cmake by 10% or so, which is consistent
with expectations (using `ccache` adds 15-30ms in experimental testing;
cmake checks are often faster than that).

BUG=b:215747936
TEST=CQ

Change-Id: I1a12e50277b37af7bb0b6a58fea2de10006983c8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/3411542
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Commit-Queue: George Burgess <gbiv@chromium.org>
Tested-by: George Burgess <gbiv@chromium.org>
2 files changed