The vector-length-128-3.c test-case uses GOMP_OPENACC_DIM=-:-:128, but '-' is
not yet supported on trunk.  Use GOMP_OPENACC_DIM=::128 instead.

2019-01-07  Tom de Vries  <tdevries@suse.de>

	* testsuite/libgomp.oacc-c-c++-common/vector-length-128-3.c: Fix
	GOMP_OPENACC_DIM argument.

From-SVN: r267624