webui-aria2: dummy version bump

The source download storage contains a 0 byte version
of the webui-aria2 sources, which breaks buildbot.

Trigger a new download by bumping the version by a date.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

net/webui-aria2/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=webui-aria2
-PKG_SOURCE_DATE:=2017-05-21
+PKG_SOURCE_DATE:=2017-05-22
 PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://github.com/ziahamza/webui-aria2
-PKG_MIRROR_HASH:=b6f78aebcb530778b28c681e5573319c0293b349f16978b685d4e8d34076e9bf
+PKG_MIRROR_HASH:=331d966657a7f0174a1e20a607cae64a67165f130912b757e4c7398d73595961
 PKG_SOURCE_VERSION:=d1ce5b992680f4d03eeee899ed8280cbcab8961a
 
 PKG_LICENSE:=MIT