Add a couple of ostringstream tests that exhibit the xlocale leak (see issue 257)
Add a couple of ostringstream tests that exhibit the xlocale leak (see issue 257)

SVN-Revision: 361

code4bones/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,LohithBlaze/drmemory,code4bones/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,LohithBlaze/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,code4bones/drmemory,sigma-random/drmemory,sigma-random/drmemory,code4bones/drmemory,code4bones/drmemory