Fix gcc.dg/pr92301.c on targets that don't support argc/argv.

2020-03-25  Sandra Loosemore  <sandra@codesourcery.com>

	gcc/testsuite/
	* gcc.dg/pr92301.c (main): Allow argc to be 0 to support
	embedded targets.

gcc/testsuite/ChangeLog

+2020-03-25  Sandra Loosemore  <sandra@codesourcery.com>
+
+	* gcc.dg/pr92301.c (main): Allow argc to be 0 to support
+	embedded targets.
+
 2020-03-25  Jakub Jelinek  <jakub@redhat.com>
 
 	PR debug/94296

gcc/testsuite/gcc.dg/pr92301.c

@@ -23,7 +23,7 @@ int main(int argc, char **argv)
   for (unsigned i = 0; i < N; i++)
     a[i] = i;
 
-  if (argc == 1)
+  if (argc < 2)
     m = 17;
 
   unsigned int r = df_count_refs(1);