PR libstdc++/60497
	* include/std/tuple (get): Qualify calls to prevent ADL.
	* testsuite/20_util/tuple/60497.cc: New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_8-branch@209842 138bc75d-0d04-0410-961f-82ee72b054a4