[v3] testsuite/ext cleanups

[Aaron W. LaFramboise]

Benjamin Kosnik wrote:

>>This breaks i686-pc-mingw32 bootstrap.
>>
>>testsuite/testsuite_abi.h includes <ext/hash_map>, and the command line
>>for testsuite/testsuite_abi.cc specifies "-I.", so GCC incorrectly
>>attempts to include testsuite/ext/hash_map, which is the new directory,
>>which obviously won't work.
> 
> Here's a patch that should fix your bootstrap problem. Please let me
> know if it resolves your issue.

The patch, as you checked it into mainline, fixes the problem of
bootstrap failing in libstdc++-v3.  However, there are suddenly hundreds
of new testsuite failures for C++ and libstdc++ on i686-pc-mingw32 (at
least as earily as 20041028).  I have not investigated this yet, but it
does not seem to be related.

Aaron W. LaFramboise