A different set of hacks to make the crossref tests pass on powerpc64
and powerpc64le.
* testsuite/ld-scripts/crossref.exp: Remove -mcall-aixdesc hack.
* testsuite/ld-scripts/cross2.t: Tweak .opd and .toc placement.
* testsuite/ld-scripts/cross3.t: Likewise.
* testsuite/ld-scripts/cross4.t: Likewise.
* testsuite/ld-scripts/cross5.t: Likewise.
* testsuite/ld-scripts/cross6.t: Likewise.
* testsuite/ld-scripts/cross7.t: Likewise.
Fixes failures on hppa-linux and alpha-linux due to not merging
.data.* and .sdata into .data. cross3.t modified too since it is the
template for the NOCROSSREFS_TO scripts.
* testsuite/ld-scripts/cross3.t: Add commonly used data
and text section names to output section statements.
* testsuite/ld-scripts/cross4.t: Likewise.
* testsuite/ld-scripts/cross5.t: Likewise.
* testsuite/ld-scripts/cross6.t: Likewise.
* testsuite/ld-scripts/cross7.t: Likewise.