running 4.4 libstdc++ testsuite using 4.5's libstdc++ shared library

[Matthias Klose]

running 4.4's libstdc++ testsuite using 4.5's libstdc++ shared library shows 
some additional test failures, compared to running 4.4 libstdc++ testsuite using 
the libstdc++ from the same build.

For two regressions found (running the binaries built with 4.4 on a system with 
4.5's libstdc++ shared library) I filed PR44679 and PR44680, the two remaining 
additional failures

FAIL: 27_io/basic_istream/extractors_arithmetic/char/13.cc execution test

13.exe: 
/scratch/packages/gcc/4.4/u/gcc-4.4-4.4.4/src/libstdc++-v3/testsuite/27_io/basic_istream/extractor
s_arithmetic/char/13.cc:62: void test13(): Assertion `i == 0' failed.

FAIL: 27_io/basic_istream/extractors_arithmetic/wchar_t/13.cc execution test

13.exe: 
/scratch/packages/gcc/4.4/u/gcc-4.4-4.4.4/src/libstdc++-v3/testsuite/27_io/basic_istream/extractor
s_arithmetic/wchar_t/13.cc:59: void test13(): Assertion `i == 0' failed.

were fixed for the trunk in revision 149704.  Would it be ok to apply the 
changes in the testuite to the gcc-4_4-branch?

   Matthias
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