PR c/65120

	PR c/65120
	* c-typeck.c (parser_build_binary_op): Don't warn for
	!!x == y or !b == y where b is _Bool.

	* parser.c (cp_parser_binary_expression): Don't warn for
	!!x == y or !b == y where b is bool.

	* c-c++-common/pr49706.c: Adjust tests for not warning
	about !!x == y or !b == y where b is boolean, and add
	some further tests.
	* c-c++-common/pr62199-2.c: Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@221284 138bc75d-0d04-0410-961f-82ee72b054a4