added a script to update llvm-mc test file (#107246)

Added a script to update the test file generated by llvm-mc binary. The
script accepts .s and .txt for asm and dasm.

For mc test I am targetting there is no function name which can be used
as a key, thus no clear mapping between input and output. The script
assumes the test are always line-by-line and it update the output marker
for each test line-by-line.

---------

Co-authored-by: Alexander Richardson <mail@alexrichardson.me>

0 files changed, 0 insertions, 0 deletions