[source] ubox: update to the latest version

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/c8f7031ba76824642035ed0525fd640e00f58926

commit c8f7031ba76824642035ed0525fd640e00f58926
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Fri Mar 3 12:01:30 2017 +0100

    ubox: update to the latest version
    
    21a4bd0 kmodloader: modprobe: return 0 for loaded modules
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 package/system/ubox/Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/package/system/ubox/Makefile b/package/system/ubox/Makefile
index ff8dead..8ccd9dd 100644
--- a/package/system/ubox/Makefile
+++ b/package/system/ubox/Makefile
@@ -5,9 +5,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(LEDE_GIT)/project/ubox.git
-PKG_SOURCE_DATE:=2017-02-23
-PKG_SOURCE_VERSION:=3dc78a47685b74f8a30739b41df365ef90535d54
-PKG_MIRROR_HASH:=0f039eea1046273767882de093e57aca720825ea49c80fd64e221ab64cc5d590
+PKG_SOURCE_DATE:=2017-03-03
+PKG_SOURCE_VERSION:=21a4bd04062e16164f4f3e1c67005a062f470b0c
+PKG_MIRROR_HASH:=2cab4f98fc1e7fc9911e5fa272e711fed1c7f612b392566a6b7524d60af73d23
 CMAKE_INSTALL:=1
 
 PKG_LICENSE:=GPL-2.0