ccache-3.1.9 build with libc-2.13 for backward compatibility

Change-Id: Ife0ebfa0fa06e37d8bd586e931143628e5a8f6fc
ccache-3.1.9 built against glibc-2.12 from CentOS 6

Change-Id: I138fe229b3cf36464f9c9596bf2f8788d8bd9d2e