mysql5.5: fix install path isn't expected.

component/mysql-5.5/buildout.cfg

@@ -4,6 +4,7 @@ extends =
   ../automake/buildout.cfg
   ../bison/buildout.cfg
   ../cmake/buildout.cfg
+  ../flex/buildout.cfg
   ../groonga/buildout.cfg
   ../libaio/buildout.cfg
   ../libtool/buildout.cfg
@@ -74,3 +75,14 @@ environment =
   CPPFLAGS=-I${groonga:location}/include/groonga
   LDFLAGS=-L${groonga:location}/lib
   PKG_CONFIG_PATH=${groonga:location}/lib/pkgconfig
+
+[mysql-5.5:cygwin]
+url = ftp://lug.mtu.edu/cygwin/release/mysql/mysql-5.5.31-1-src.tar.bz2
+md5sum = 03074962125210f56ad42861cfe419c9
+patches =
+configure-command = cygport
+configure-options =
+  mysql.cygport
+  prep
+  compile
+make-options = -C mysql-5.5.31-1/build