Enable libclang_rt.ubsan_standalone-x86_64-android

Uncomments the x86_64 version of ubsan_standalone. This enabling CFI
for these builds.

Bug: 30227045
Test: lunch aosp_x86_64-eng && ENABLE_CFI=true m -j40 checkbuild
Change-Id: I06796044133e6878308e19872a0525f32b814ecb
1 file changed