[gcc] Add nacl to libstdc++'s list of glibc-based architectures

[gcc] Add nacl to libstdc++'s list of glibc-based architectures

Note that this does not affect newlib-based libstdc++ builds, for
which crossconfig.m4 is not consulted (see configure.ac).

Update "configure" by running autoconf 2.59.

BUG=http://code.google.com/p/nativeclient/issues/detail?id=660
TEST=build full-gcc against nacl-glibc

Committed: http://code.google.com/p/nativeclient/source/detail?r=3090

[Mark Seaborn, 2010-08-23 15:32:50]

This is the companion change to http://codereview.chromium.org/3146033/show

[khimg, 2010-08-23 18:12:10]

configure includes two changes:
1. Change for compiler features produced from change in crossconfig.m4
2. Cleanup change which removes useless changes from configure file

Can we please split these in two commits?

[Mark Seaborn, 2010-08-23 20:37:27]

On 2010/08/23 18:12:10, khimg wrote:
> configure includes two changes:
> 1. Change for compiler features produced from change in crossconfig.m4
> 2. Cleanup change which removes useless changes from configure file
> 
> Can we please split these in two commits?

Sure.  Done.

Mark

[khimg, 2010-08-23 21:48:02]

LGTM