package/efl: switch to luajit support

package/efl: switch to luajit support

In efl 1.15.x, Lua "old" support is broken with Lua 5.2+ [1].

With the patch added in efl 1.16 to fixes this issue, libevas fail to link with
the following error:

CCLD bin/ecore_evas/ecore_evas_convert
host-efl-1.16.1/src/lib/evas/.libs/libevas.so: undefined reference to `luaL_openlib'
collect2: error: ld returned 1 exit status
Makefile:19021: recipe for target 'bin/ecore_evas/ecore_evas_convert' failed

Since 9ba8d1cce4ab00307827083bae234d87b37fb967, the luajit support can be
enabled in efl package.
In order to update the efl stack to 1.17, switch to luajit support and remove
Lua "old" support since it's not fixed upstream yet. But the drawback is the
efl stack depends implicitely on BR2_PACKAGE_LUAJIT_ARCH_SUPPORTS.

[1] https://phab.enlightenment.org/T2728

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>