gimplify.c (gimplify_scan_omp_clauses): Call sorry_at for valid but unsupported lastprivate with conditional modifier.

	* gimplify.c (gimplify_scan_omp_clauses): Call sorry_at for valid
	but unsupported lastprivate with conditional modifier.

	* c-c++-common/gomp/lastprivate-conditional-1.c: New test.
	* c-c++-common/gomp/lastprivate-conditional-2.c: New test.

From-SVN: r265987