C_FILE symbols. To match the behavior of the assembler and the legacy
compiler, this includes using the generic ".file" name for the C_FILE
symbol and generating the actual file name in an auxiliary entry.
Summary: This patch handles the SectionKind of ReadOnlyWithRel on AIX. The failure was discovered during sanitizer enablement and occured with `-fsanitize-coverage` option.
Reviewed By: hubert.reinterpretcast
Differential Revision: https://reviews.llvm.org/D157483