New AIX failures

[David Edelsohn]

	After the latest update, I am seeing a very large number of new
failures on AIX, all of the following form:

FAIL: 23_containers/bitset/invalidation/1.cc (test for excess errors)
Excess errors:
/gcc/dje/src/libstdc++-v3/testsuite/23_containers/bitset/invalidation/1.cc:24: error: use of `bitset' is ambiguous
/gcc/dje/build/powerpc-ibm-aix5.1.0.0-20031112/powerpc-ibm-aix5.1.0.0/libstdc++-v3/include/bitset:604: error:   first declared as `template<long unsigned int _Nb> class __gnu_norm::bitset' here
/gcc/dje/build/powerpc-ibm-aix5.1.0.0-20031112/powerpc-ibm-aix5.1.0.0/libstdc++-v3/include/debug/bitset:42: error:   also declared as `template<long unsigned int _Nb> class __gnu_debug_def::bitset' here
/gcc/dje/src/libstdc++-v3/testsuite/23_containers/bitset/invalidation/1.cc:24: error: `__gnu_debug::bitset' has not been declared
/gcc/dje/src/libstdc++-v3/testsuite/23_containers/bitset/invalidation/1.cc:31: error: `bitset' undeclared (first use this function)
/gcc/dje/src/libstdc++-v3/testsuite/23_containers/bitset/invalidation/1.cc:31: error: (Each undeclared identifier is reported only once for each function it appears in.)
/gcc/dje/src/libstdc++-v3/testsuite/23_containers/bitset/invalidation/1.cc:31: error: `::reference' has not been declared
/gcc/dje/src/libstdc++-v3/testsuite/23_containers/bitset/invalidation/1.cc:31: error: `i' undeclared (first use this function)
/gcc/dje/src/libstdc++-v3/testsuite/23_containers/bitset/invalidation/1.cc:33: error: `bs' undeclared (first use this function)
/gcc/dje/src/libstdc++-v3/testsuite/23_containers/bitset/invalidation/1.cc:35: error: expected type-name
/gcc/dje/src/libstdc++-v3/testsuite/23_containers/bitset/invalidation/1.cc:35: error: expected type-name
/gcc/dje/src/libstdc++-v3/testsuite/23_containers/bitset/invalidation/1.cc:35: error: `::reference' has not been declared

WARNING: 23_containers/bitset/invalidation/1.cc compilation failed to produce executable