[lld-macho][nfc] Re-enable previously disabled test.

[lld-macho][nfc] Re-enable previously disabled test.

This check was previous disabled because the test kept failing on ARM64. The output from reported failure message
gave the impression that the bundle was created as an x86-64 bundle but upon further inspection, I believe that's
a bug in llvm-otool where it prints both -h and -f for both input files on ARM64.

So the "fix" here is to rewrite the test to run the two otool commands separately but concatenate the
output into one file for checking.

Differential Revision: https://reviews.llvm.org/D140987