[gnome-builder] README: fix gnome-world moduleset

[Igor Gnatenko <ignatenko src gnome org>]

commit 6f4627503a1dd380952bce3441f6d8c2e3d14c84
Author: Igor Gnatenko <ignatenko src gnome org>
Date:   Sat Jan 3 02:35:42 2015 +0300

    README: fix gnome-world moduleset
    
    In 5a7bda02cf5247a86fdfb2b6dd2231fc3355b5ab we have introduced using
    gnome-world moduleset, but we had mistake in jhbuild syntax.
    
    -m option is main option for jhbuild, not for jhbuild build
    
    Signed-off-by: Igor Gnatenko <ignatenko src gnome org>

 README |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/README b/README
index fcdebc3..c2bdd72 100644
--- a/README
+++ b/README
@@ -34,7 +34,7 @@ get started is to use the development tool jhbuild to install from source.
   ./autogen.sh
   make
   make install
-  jhbuild build -m gnome-world gnome-builder
+  jhbuild -m gnome-world build gnome-builder
   jhbuild run gnome-builder
 
 We hope to have VM images that can be used for testing in the near future.