-Waddress fixes for gold testsuite

Current mainline gcc.
common_test_1.c: In function 'main':
common_test_1.c:56:14: error: comparison between two arrays [-Werror=array-compare]
   56 |   assert (c5 > c4);
      |              ^
common_test_1.c:56:14: note: use '&c5[0] > &c4[0]' to compare the addresses

	* testsuite/common_test_1.c: Avoid -Waddress warnings.
	* testsuite/common_test_1_v1.c: Likewise.
	* testsuite/common_test_1_v2.c: Likewise.
	* testsuite/script_test_2.cc: Likewise.