Switch to library requirements instead of source. As source puts extra source in install targets.

build.jam

@@ -7,8 +7,8 @@ import project ;
 
 project /boost/bind
     : common-requirements
-        <source>/boost/config//boost_config
-        <source>/boost/core//boost_core
+        <library>/boost/config//boost_config
+        <library>/boost/core//boost_core
         <include>include
     ;