Pass more -pgm flags in the ghc wrapper; fixes #3863

ghc/ghc.wrapper

-exec "$executablename" -B"$topdir" -pgmc "$pgmgcc" ${1+"$@"}
+exec "$executablename" -B"$topdir" -pgmc "$pgmgcc" -pgma "$pgmgcc" -pgml "$pgmgcc" -pgmP "$pgmgcc -E -undef -traditional" ${1+"$@"}