postgresql: remove devfiles from target

Signed-off-by: Floris Bos <bos@je-eigen-domein.nl>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/postgresql/postgresql.mk

@@ -51,6 +51,7 @@ endef
 
 define POSTGRESQL_INSTALL_TARGET_FIXUP
 	$(INSTALL) -dm 0700 $(TARGET_DIR)/var/lib/pgsql
+	$(RM) -rf $(TARGET_DIR)/usr/lib/postgresql/pgxs
 endef
 
 POSTGRESQL_POST_INSTALL_TARGET_HOOKS += POSTGRESQL_INSTALL_TARGET_FIXUP