s3c64xx-gpio: mark as having broken "make clean"

Set CLEANBROKEN as the Makefile has no "clean" target.

Signed-off-by: Bob Ham <bob.ham@collabora.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-support/samsung-soc-utils/s3c64xx-gpio_svn.bb

@@ -9,6 +9,8 @@ PV = "1.0+svnr${SRCPV}"
 SRC_URI = "svn://svn.openmoko.org/trunk/src/target;module=gpio;protocol=http"
 S = "${WORKDIR}/gpio"
 
+CLEANBROKEN = "1"
+
 do_compile() {
     ${CC} ${CFLAGS} ${LDFLAGS} -static -o ${PN} gpio-s3c6410.c
 }