winGRASS installer: define ARCHIVE_NAME2012 only for 64bit (see https://trac.osgeo.org/grass/ticket/2996)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@70123 15284696-431f-4ddb-bdfa-cd5b030d7da7

mswindows/GRASS-Installer.nsi.tmpl

@@ -493,7 +493,9 @@ Var /GLOBAL ARCHIVE_NAME
 ;Var /GLOBAL ARCHIVE_NAME2005
 Var /GLOBAL ARCHIVE_NAME2008
 Var /GLOBAL ARCHIVE_NAME2010
-Var /GLOBAL ARCHIVE_NAME2012
+!if ${PLATFORM} == "x86_64"
+    Var /GLOBAL ARCHIVE_NAME2012
+!endif
 Var /GLOBAL ARCHIVE_NAME2013
 Var /GLOBAL EXTENDED_ARCHIVE_NAME
 Var /GLOBAL ORIGINAL_UNTAR_FOLDER