libiconv-full: update to version 1.16

libiconv-full: update to version 1.16

- Removed following patches:
100-strip_charsets.patch - makes the full variant slim.
101-autotools.patch - this one fails to apply because it was backported
from newer versions for 1.11.1.
103-configure_ac_fix.patch - backported from newer versions
200-work-with-libtool2.patch - is not needed anymore, it is done
differently in upstream
300-fortify-source-compat.patch - these files are not there anymore

- TVHeadend requires working iconv library e.g. transliteration to ASCII
and this does not work with libiconv-full currently.

There is a simple test, which requires to install iconv package.

Before applying this update:
root@turris:/# echo ŽluťoučkýKůň | iconv -t ASCII//TRANSLIT//IGNORE
luoukK

After applying this update:
root@turris:~# echo ŽluťoučkýKůň | iconv -t ASCII//TRANSLIT//IGNORE
Zlutouck'yKun

- Makefile changes:
Use HTTPS for their website
Fixed deprecated SPDX License Identifier
Move PKG_MAINTAINER above PKG_LICENSE

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>
Tested-by: Rosen Penev <rosenp@gmail.com> [malta]