Fix the following tests when running under cross-compilation:

 Profile-aarch64 :: Linux/comdat_rename.test
 Profile-aarch64 :: Linux/extern_template.test
 Profile-aarch64 :: Linux/instrprof-comdat.test
 Profile-aarch64 :: Linux/instrprof-cs.c

The issue is that the created (aarch64) binaries were attempting to run natively
instead of running through %run, which guarantees running in the proper
environment if the compilation was configured correctly.

llvm-svn: 282264