g++ -mabi=64 testsuite failures on irix6.5

[Billinghurst, David (CRTS)]

g++ on 3.0 branch is bootstrapping again on irix6.5, and the default
-mabi=n32 results are reasonable.  However, the testsuite results for
g++-mabi=64 are not good.

		=== g++ Summary for unix/-mabi=64 ===

# of expected passes		6292
# of unexpected failures	110
# of unexpected successes	4
# of expected failures		110
# of untested testcases		20


See gcc-testresults for the full story.