Use the default C version. am: d86fbe0e22

Original change: https://android-review.googlesource.com/c/platform/external/virglrenderer/+/2628293

Change-Id: I41c1ec418d7ae132bd70c2ce08884ad158ae6ce8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>