Made test output iterators have value_type of 'void'; matches ones in library

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@171980 91177308-0d34-0410-b5e6-96231b3b80d8
Fix exception safety bug in vector::push_back

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@172250 91177308-0d34-0410-b5e6-96231b3b80d8
Michael van der Westhuizen:  Patches for Linux.  Fixes http://llvm.org/bugs/show_bug.cgi?id=14648.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@172435 91177308-0d34-0410-b5e6-96231b3b80d8
Michael van der Westhuizen: Improve support for testing on Linux.  Fixes http://llvm.org/bugs/show_bug.cgi?id=14892.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@172436 91177308-0d34-0410-b5e6-96231b3b80d8
Fix string conversions functions to throw out_of_range properly.  Fixes http://llvm.org/bugs/show_bug.cgi?id=14919.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@172447 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a race in the construction of future.  This fixes http://llvm.org/bugs/show_bug.cgi?id=14934.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@172456 91177308-0d34-0410-b5e6-96231b3b80d8
Make <cmath> classification macros work with integral types.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@172461 91177308-0d34-0410-b5e6-96231b3b80d8
Optimize basic_ostream::write by having it call sputn instead of sputc.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@172542 91177308-0d34-0410-b5e6-96231b3b80d8
Make a few tests optimization-proof.  These tests were failing under -O3 because the optimizer was eliminating the call to new.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@172631 91177308-0d34-0410-b5e6-96231b3b80d8