add proper GNU stack markings so we dont get the default: executable

--- zip-2.31/crc_i386.S
+++ zip-2.31/crc_i386.S
@@ -238,3 +238,7 @@
 #endif /* i386 || _i386 || _I386 || __i386 */
 
 #endif /* !USE_ZLIB && !CRC_TABLE_ONLY */
+
+#if defined __ELF__ && defined __linux__
+.section .note.GNU-stack,"",@progbits
+#endif
--- zip-2.31/match.S
+++ zip-2.31/match.S
@@ -405,3 +405,7 @@
 #endif /* i386 || _I386 || _i386 || __i386  */
 
 #endif /* !USE_ZLIB */
+
+#if defined __ELF__ && defined __linux__
+.section .note.GNU-stack,"",@progbits
+#endif