Fixed stack execution for arm

Author: hpux735

stdlib/public/runtime/swift_sections.S

@@ -76,4 +76,8 @@ define_simple_section swift3_assocty
 
 define_sized_section swift2_protocol_conformances
 define_sized_section swift2_type_metadata
-.section	.note.GNU-stack,"",@progbits
+#if defined(__arm__)
+    .section .note.GNU-stack,"",%progbits
+#else
+    .section .note.GNU-stack,"",@progbits
+#endif