Cleaning up static initializers in TimeValue.

Code reviewed by Chandlerc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216703 91177308-0d34-0410-b5e6-96231b3b80d8
Cleaning up static initializers in Signals.inc

Reviewed by: Chandlerc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216704 91177308-0d34-0410-b5e6-96231b3b80d8