[packages] libjpeg-turbo: 1.2.1 Version Bump

The license changed in version 1.2.0 from the wxWindows Library license to the 3-clause BSD license.

v2: Corrects licensing information in the Makefile.
v3: Extend Copyright to 2013. The 2011 is from the original package submission in Dec. 2011 of libjpeg-turbo to OpenWrt.

Signed-off-by: Ian Leonard <antonlacon@gmail.com>
Signed-off-by: Vasilis Tsiligiannis <b_tsiligiannis@silverton.gr>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@35182 3c298f89-4303-0410-b956-a3cf2f4a3e73