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

Author: grafikrobot

build.jam

@@ -7,23 +7,23 @@ import project ;
 
 project /boost/algorithm
     : common-requirements
-        <source>/boost/array//boost_array
-        <source>/boost/assert//boost_assert
-        <source>/boost/bind//boost_bind
-        <source>/boost/concept_check//boost_concept_check
-        <source>/boost/config//boost_config
-        <source>/boost/core//boost_core
-        <source>/boost/exception//boost_exception
-        <source>/boost/function//boost_function
-        <source>/boost/iterator//boost_iterator
-        <source>/boost/mpl//boost_mpl
-        <source>/boost/range//boost_range
-        <source>/boost/regex//boost_regex
-        <source>/boost/static_assert//boost_static_assert
-        <source>/boost/throw_exception//boost_throw_exception
-        <source>/boost/tuple//boost_tuple
-        <source>/boost/type_traits//boost_type_traits
-        <source>/boost/unordered//boost_unordered
+        <library>/boost/array//boost_array
+        <library>/boost/assert//boost_assert
+        <library>/boost/bind//boost_bind
+        <library>/boost/concept_check//boost_concept_check
+        <library>/boost/config//boost_config
+        <library>/boost/core//boost_core
+        <library>/boost/exception//boost_exception
+        <library>/boost/function//boost_function
+        <library>/boost/iterator//boost_iterator
+        <library>/boost/mpl//boost_mpl
+        <library>/boost/range//boost_range
+        <library>/boost/regex//boost_regex
+        <library>/boost/static_assert//boost_static_assert
+        <library>/boost/throw_exception//boost_throw_exception
+        <library>/boost/tuple//boost_tuple
+        <library>/boost/type_traits//boost_type_traits
+        <library>/boost/unordered//boost_unordered
         <include>include
     ;