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

Author: grafikrobot

build.jam

@@ -7,16 +7,16 @@ import project ;
 
 project /boost/lambda
     : common-requirements
-        <source>/boost/bind//boost_bind
-        <source>/boost/config//boost_config
-        <source>/boost/core//boost_core
-        <source>/boost/detail//boost_detail
-        <source>/boost/iterator//boost_iterator
-        <source>/boost/mpl//boost_mpl
-        <source>/boost/preprocessor//boost_preprocessor
-        <source>/boost/tuple//boost_tuple
-        <source>/boost/type_traits//boost_type_traits
-        <source>/boost/utility//boost_utility
+        <library>/boost/bind//boost_bind
+        <library>/boost/config//boost_config
+        <library>/boost/core//boost_core
+        <library>/boost/detail//boost_detail
+        <library>/boost/iterator//boost_iterator
+        <library>/boost/mpl//boost_mpl
+        <library>/boost/preprocessor//boost_preprocessor
+        <library>/boost/tuple//boost_tuple
+        <library>/boost/type_traits//boost_type_traits
+        <library>/boost/utility//boost_utility
         <include>include
     ;