An overly specific glob pattern in the package install sections prevents
the unversioned .so symlinks from getting copied into the .ipk.

This commit changes the pattern from xxx.so.* to xxx.so* in order to copy
those symlinks too. Fixes #382.

Also bump the copyright year in the Makefile while we're at it.

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>