API Annotations: use AnnValue for (~)
API Annotations: use AnnValue for (~)

Previously oqtycon used AnnTilde for the location of the RdrName when
parsing (~).

The recent increase in '~' characters in the AST confuses
ghc-exactprint, so this patch treats all RdrNames the same way now,
marking the location of the core name with AnnValue.

(cherry picked from commit fd686c43c45b68fec97ae4c45709358798af6121)

GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc