Put conditional "const" before version_string, not before dummy function

for VMS.  Now version 1.91.03.  (Save 1.91.02 for Cygnus P4.)

gas/version.c

@@ -1,7 +1,3 @@
-#if (__STDC__ == 1) || defined(const)
-const
-#endif
-
 /* DO NOT PUT COMMENTS ABOUT CHANGES IN THIS FILE.
    
    This file exists only to define `version_string'.
@@ -21,6 +17,10 @@ dummy3()
 }
 #endif
 
-char version_string[] = "GNU assembler version 1.91 (Cygnus Support pre-release)\n";
+#if (__STDC__ == 1) || defined(const)
+const
+#endif
+
+char version_string[] = "GNU assembler version 1.91.03 (Cygnus Support pre-release)\n";
 
 /* end of version.c */