ubox: update to latest git HEAD

the return code of a pipe() was not checked properly

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 45141

package/system/ubox/Makefile

@@ -1,13 +1,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ubox
-PKG_VERSION:=2015-03-27
+PKG_VERSION:=2015-03-29
 PKG_RELEASE=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=git://nbd.name/luci2/ubox.git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=7f9c974feb82a57f7fc16118478ea219c7bed407
+PKG_SOURCE_VERSION:=dd338ce30b6158f3f6feda9f01a2f409a8a5832c
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.gz
 CMAKE_INSTALL:=1
 PKG_CHECK_FORMAT_SECURITY:=0