re PR testsuite/61319 (The tests c-c++-common/ubsan/float-cast-overflow-(1|2|4).c fail on x86_64-apple-darwin*)

	PR testsuite/61319
	* c-c++-common/ubsan/float-cast.h: Conditionally define LLONG_MAX,
	LLONG_MIN, and ULLONG_MAX.

From-SVN: r210970