ustream-ssl: correct year in PKG_VERSION string

ustream-ssl: correct the year in the PKG_VERSION string, as both r45157 and
r45441 left the old year 2014 there. For a casual user it may seem that the
current code is from April 2014, although
a4ca61527236e89eb9efb782fd9bfd04796144e3 is from April 2015.

http://nbd.name/gitweb.cgi?p=ustream-ssl.git;a=commit;h=a4ca61527236e89eb9efb782fd9bfd04796144e3
https://dev.openwrt.org/changeset/45441/
https://dev.openwrt.org/changeset/45157/



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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45623 3c298f89-4303-0410-b956-a3cf2f4a3e73