C++ ABI testing issues, gcc-3.3 <-> gcc-3.2 compatibility

[Benjamin Kosnik]

My second round results matched my first round. Both libstdc++ and g++
testsuites show additional errors, all around eh type issues, but only
for the 3_2-branch g++ with the 3.3 libstdc++.so. The other way around
resulted in no additional failures.

		=== g++ Summary ===

# of expected passes		7154
# of unexpected failures	112
# of expected failures		88
# of untested testcases		9
# of unsupported tests		3

		=== libstdc++-v3 Summary ===

# of expected passes		394
# of unexpected failures	15
# of unexpected successes	26


These results are different than Jakub's, although he also seemed to
find issues.

-benjamin