Let SetValue Take and Init Name

Let SetValue Take and Init Name

Convert SetValue to take the value name as an Init.  This allows us to
set values for variables whose names are not yet fully resolved.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142499 91177308-0d34-0410-b5e6-96231b3b80d8