system_api: use '-fPIC' for libsystem_api-chaps-protos.a

libsystem_api-chaps-protos.a is linked into a shared library,
so we should build it with -fPIC instead of -fPIE.

BUG=chromium:722464
TEST=cbuildbot amd64-generic-asan, it builds fine.

Change-Id: I0f1409c4a10f5ccaf3d5303d6b315ae4c0f08c47
Reviewed-on: https://chromium-review.googlesource.com/506033
Commit-Ready: Yunlian Jiang <yunlian@chromium.org>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed