compiler-rt/test: Bring back -pie on Android.

Looks like the sanitizer-x86_64-linux-android bot started failing because -pie is still needed when targeting API levels < 16 (which is the case by default for arm and i686). llvm-svn: 351270

Author: pcc

compiler-rt/test/lit.common.cfg

@@ -59,7 +59,7 @@ if config.asan_shadow_scale != '':
 # is a transitive shared library dependency (via asan runtime).
 if config.android:
  # Prepend the flag so that it can be overridden.
- config.target_cflags = "-fuse-ld=gold " + config.target_cflags
+ config.target_cflags = "-pie -fuse-ld=gold " + config.target_cflags
  config.cxx_mode_flags.append('-stdlib=libstdc++')
 
 # Clear some environment variables that might affect Clang.