Update the test framework for llvm-cvtres to be more comprehensive.

Summary: Added test cases for multiple machine types, file merging, multiple languages, and more resource types.  Also fixed new bugs these tests exposed.

Subscribers: javed.absar, llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D34047

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305258 91177308-0d34-0410-b5e6-96231b3b80d8
15 files changed