OpenMP: Fix SIMT for complex/float reduction with && and ||

2021-05-07  Tobias Burnus  <tobias@codesourcery.com>
	    Tom de Vries  <tdevries@suse.de>

gcc/ChangeLog:

	* omp-low.c (lower_rec_simd_input_clauses): Set max_vf = 1 if
	a truth_value_p reduction variable is nonintegral.

libgomp/ChangeLog:

	* testsuite/libgomp.c-c++-common/reduction-5.c: New test, testing
	complex/floating-point || + && reduction with 'omp target'.
	* testsuite/libgomp.c-c++-common/reduction-6.c: Likewise.