Fix warning issued when using the -fhpc flag

When compiling multi-module code, -fhpc compiled code issues various warning of the form

/Users/andy/darcs/ghc/ghc-quick-1/libraries/base/dist/build/GHC/Base.hi
Declaration for flip
Unfolding of GHC.Base.flip:
  Iface id out of scope:  {tick (base:GHC.Base, 95)}

They seem benign, but need investigated, and either removed or corrected.

Trac metadata

Trac field	Value
Version	6.7
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Code Coverage
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	Unknown
Architecture	Unknown