[csl-arm] Merge from 3.4

[Richard Earnshaw]

> I've committed a merge from 3.4 branch to csl-arm-branch.
> 
> This brings with it a few new testsuite failures:
> * arm:
> FAIL: 21_strings/basic_string/cons/char/6.cc execution test
> 
> * thumb:
> FAIL: gcc.dg/arm-mmx-1.c scan-assembler ldmfd[ \t]sp!.*ip,[ ]*pc

There's a patch to the trunk version of this test to disable it for Thumb, 
clearly that needs pulling onto the 3.4 branch as well.

> FAIL: g++.dg/expr/anew1.C execution test
> FAIL: g++.dg/expr/anew2.C execution test
> FAIL: g++.dg/expr/anew3.C execution test
> FAIL: g++.dg/expr/anew4.C execution test
> FAIL: 21_strings/basic_string/cons/char/6.cc execution test
> 
> There are no new failures specific to the branch.
> 

Do you know whether these are new tests that fail, or regressions?

R.