MFC r258017, r258429, r258748, r258817:

Merge updates from FSF pre4.3 GCC inspired on Apple's gcc:

Updates to libiberty and mangling.
New align attribute.
Merge Apple updates to libstdc++.

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Fix a number of other clang warnings in libstdc++, which could appear
when building other C++ software with it. Also fix one actual bug in
libsupc++, which was exposed by such a warning. This latter fix is the
only functional change.

MFC after: 1 week

Update libstdc++ with small updates from the latest rev. (135556)
from the gcc 4.2 branch.
The libraries in the gcc-4_2-branch remained under the LGPLv2.

The changes can be reproduced with the following command:

svn diff svn://gcc.gnu.org/svn/gcc/branches/gcc-4_2-branch/libstdc++-v3
-r 127959:135556

Reviewed by: mm
Approved by: jhb (mentor)
MFC after: 2 weeks

Some fixes so we can build libstdc++ with clang:
o Make the value_type, vector_type, iterator, __mutex_type types of
free_list class so we can access them
o In some cases template keywords must be inserted to treat classes as
dependent template names
o Remove two 'inline' keywords where they do not make sense

Submitted by: Dimitry Andric <dimitry at andric.com>
Reviewed by: trema

This commit was generated by cvs2svn to compensate for changes in r169708,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r169691,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r146897,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r133582,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r132720,
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This commit was generated by cvs2svn to compensate for changes in r117397,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r110614,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r107606,
which included commits to RCS files with non-trunk default branches.

Remove files no longer part of the gcc_3_2_anoncvs_20021009 libstdc++.

Approved by: re(jhb)

This commit was generated by cvs2svn to compensate for changes in r103447,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r102782,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r97403,
which included commits to RCS files with non-trunk default branches.