Speculatively fix the sphinx build, which does not think the original code was...

Speculatively fix the sphinx build, which does not think the original code was valid nasm (http://lab.llvm.org:8011/builders/llvm-sphinx-docs/builds/11854/steps/docs-llvm-html/logs/stdio).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275408 91177308-0d34-0410-b5e6-96231b3b80d8