lang/ghc{,96}: port to powerpc64
- In the Makefile, switch ARCH == powerpc64le to ARCH:Mpowerpc64*,
- Add some additional ARCH == powerpc64 for switching to ELFv2, since GHC assumes powerpc64 is ELFv1.
- Add additional patch to disable ELFv1 code in StgCRun.c.
Bootstrap is built against 14.3-RELEASE.
PR: 295675
Approved by: arrowd@