qual -> equal in LangRef.rst

[Robison, Arch]

Attached is trivial patch for review that corrects a typo.

- Arch

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20150224/8ba6b55c/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: LangRef.rst.patch
Type: application/octet-stream
Size: 639 bytes
Desc: LangRef.rst.patch
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20150224/8ba6b55c/attachment.obj>