component/libzip: add bzip2 in rpath

In my environment this relinking to system package, I don't know why it
works in other cases.

component/libzip/buildout.cfg

@@ -26,4 +26,4 @@ environment =
   PATH=${cmake:location}/bin:%(PATH)s
   CMAKE_INCLUDE_PATH=${zlib:location}/include:${bzip2:location}/include
   CMAKE_LIBRARY_PATH=${zlib:location}/lib:${bzip2:location}/lib
-  LDFLAGS=-L${:location}/lib -Wl,-rpath=${:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
+  LDFLAGS=-L${:location}/lib -Wl,-rpath=${:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib