Don't actually build ghc itself with -dynamic

For now, with --enable-shared we'll build the libs shared,
but ghc itself will still be statically linked.
In any case, we would want to be able to build it both
ways so it's easy to test both.

ghc/ghc.mk

@@ -33,10 +33,6 @@ ghc_stage2_HC_OPTS += -threaded
 ghc_stage3_HC_OPTS += -threaded
 endif
 
-ifeq "$(BuildSharedLibs)" "YES"
-ghc_HC_OPTS += -dynamic
-endif
-
 # XXX ToDp
 # ifeq "$(GhcProfiled)" "YES"