change order, allow to build as shared extension

Author: remicollet

ext/sodium/config.m4

@@ -1,12 +1,12 @@
 dnl $Id$
 dnl config.m4 for extension sodium
 
-PHP_ARG_WITH(sodium, for sodium support,
-[  --with-sodium           Include sodium support])
-
 PHP_ARG_WITH(libsodium, for libsodium library location,
 [  --with-libsodium[[=DIR]]  libsodium library location, else rely on pkg-config])
 
+PHP_ARG_WITH(sodium, for sodium support,
+[  --with-sodium           Include sodium support])
+
 if test "$PHP_SODIUM" != "no"; then
   SEARCH_PATH="/usr/local /usr"     # you might want to change this
   SEARCH_FOR="/include/sodium.h"  # you most likely want to change this