Deprecate a few C APIs.

This deprecates:
* LLVMParseBitcode
* LLVMParseBitcodeInContext
* LLVMGetBitcodeModuleInContext
* LLVMGetBitcodeModule

They are replaced with the functions with a 2 suffix which do not record
a diagnostic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256065 91177308-0d34-0410-b5e6-96231b3b80d8
10 files changed