[BOLT][test] Fix cross-compilation tests after D151920

Fix tests that are failing in cross-compilation after D151920
(https://lab.llvm.org/buildbot/#/builders/221/builds/17715):

- instrumentation-ind-call, basic-instrumentation: add -mno-outline-atomics flag to runtime lib
- bolt-address-translation-internal-call, internal-call-instrument: add %cflags
- meta-merge-fdata: restrict to x86_64

Reviewed By: Amir

Differential Revision: https://reviews.llvm.org/D159094