cleanup needless binaries in mariadb__compile__ directory.

component/mariadb/buildout.cfg

@@ -52,6 +52,7 @@ environment =
   CMAKE_INCLUDE_PATH=${libaio:location}/include:${libaio:location}/include:${libxml2:location}/include:${ncurses:location}/include:${openssl:location}/include:${readline5:location}/include:${zlib:location}/include
   CMAKE_LIBRARY_PATH=${libaio:location}/lib:{libaio:location}/lib:${libxml2:location}/lib:${ncurses:location}/lib:${openssl:location}/lib:${readline5:location}/lib:${zlib:location}/lib
   LDFLAGS=-L${jemalloc:location}/lib -Wl,-rpath=${jemalloc:location}/lib -L${libaio:location}/lib -Wl,-rpath=${libaio:location}/lib -L${zlib:location}/lib
+make-targets = install clean
 
 [mroonga-mariadb]
 # mroonga - a storage engine for MySQL. It provides fast fulltext search feature to all MySQL users.