powerpc32: fix 64-bit comparison

powerpc32: fix 64-bit comparison

On powerpc32 64-bit comparison code generated dangling
target labels. This caused ghc build failure as:
    $ ./configure --target=powerpc-unknown-linux-gnu && make
    ...
    SCCs aren't in reverse dependent order
    bad blockId n3U

 This happened because condIntCode' in PPC codegen generated
 label name but did not place the label into `cmp_lo` code block.

 The change adds the `cmp_lo` label into the case of negative
 comparison.
 Signed-off-by: 's avatarSergei Trofimovich <slyfox@gentoo.org>
 .
Origin: https://gitlab.haskell.org/ghc/ghc/commit/25dce3fc05e4788240ac6d192919063a9f548f7f
Last-Update: 2019-08-09

Gbp-Pq: Name powerpc-fix-64-bit-comparision.patch