have_ld_plugin_support in test/lit.cfg doesn't work properly

[hjl-tools]

Bugzilla Link	22564
Version	unspecified
OS	Linux

Extended Description

have_ld_plugin_support in test/lit.cfg has 2 issues:

1. It expects gold:

   ld_version = subprocess.Popen(['ld', '--version'], stdout = subprocess.PIPE)
   if not 'GNU gold' in ld_version.stdout.read():
   return False

Ld on binutils master branch supports LLVM plugin.

2. It expects elf32ppc support:

emulations = fields[2].split()
if 'elf32ppc' not in emulations or 'elf_x86_64' not in emulations:
return False

Even my gold doesn't have elf32ppc support.

[thesamesam]

1. Requirement for gold is still a problem. The check is unnecessary.
2. The elf32ppc requirement was fixed in 152b936.