libphobos: Merge upstream druntime 2f764ab6

libphobos: Merge upstream druntime 2f764ab6

Fixes hashing of complex reals, enabling testing of rt.util.typeinfo and
core.internal.hash.

Reviewed-on: https://github.com/dlang/druntime/pull/6837

libphobos/ChangeLog:

	* Makefile.in: Rebuild.
	* configure: Rebuild.
	* libdruntime/Makefile.am: Test rt.util.typeinfo and
	core.internal.convert.
	* libdruntime/Makefile.in: Rebuild.
	* src/Makefile.in: Rebuild.
	* testsuite/Makefile.in: Rebuild.
	* testsuite/libphobos.hash/test_hash.d: Update test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@268755 138bc75d-0d04-0410-961f-82ee72b054a4