tweaked build for multibindings

git-svn-id: https://google-guice.googlecode.com/svn/trunk@455 d779f126-a31b-0410-b53b-1d3aecad763e
diff --git a/build.properties b/build.properties
index 0d831cd..fc56103 100644
--- a/build.properties
+++ b/build.properties
@@ -6,7 +6,7 @@
 assistedinject.src.dir=extensions/assistedinject/src
 commands.src.dir=extensions/commands/src
 throwingproviders.src.dir=extensions/throwingproviders/src
-multibindings.src.dir=extensions/assistedinject/src
+multibindings.src.dir=extensions/multibindings/src
 build.dir=build
 javadoc.packagenames=com.google.inject,com.google.inject.spi,\
   com.google.inject.matcher,com.google.inject.servlet,com.google.inject.name,\