Provide extra information in the "integer constant is too large" diagnostic. This will be used to improve other diagnostics.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@213657 91177308-0d34-0410-b5e6-96231b3b80d8
Improve the checkUInt32Argument() helper function so that it diagnoses integer constants larger than 32-bits.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@213658 91177308-0d34-0410-b5e6-96231b3b80d8
remove hardcoded metadata numbers from tests

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@213659 91177308-0d34-0410-b5e6-96231b3b80d8