IBM Z: Fix vector intrinsics vec_double and vec_floate

Fix the mapping of vec_double and vec_floate to builtins.

gcc/ChangeLog:

	PR target/100871
	* config/s390/vecintrin.h (vec_doublee): Fix to use
	  __builtin_s390_vflls.
	(vec_floate): Fix to use __builtin_s390_vflrd.

gcc/testsuite/ChangeLog:

	* gcc.target/s390/zvector/vec-doublee.c: New test.
	* gcc.target/s390/zvector/vec-floate.c: New test.
3 files changed