add libffi-ictce-5.3.0

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
add libffi related easyconfigs

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
Merge branch 'develop' of github.com:hpcugent/easybuild-easyconfigs into contrib_libffi-ictce-5.3.0
rewire libffi to more recent patched version and refactorize easyconfigs
Merge branch 'develop' into contrib_libffi-ictce-5.3.0
use include-xmmintrin patch in all libffi ictce easyconfigs
tweak icc_UINT128 patch for libffi 3.0.11, use it for ictce libffi 3.0.11 easyconfigs
Revert "tweak icc_UINT128 patch for libffi 3.0.11, use it for ictce libffi 3.0.11 easyconfigs"

This reverts commit 605c5f215f44d510f95756483cd46dc0121ca374.
git rid of libffi 3.0.11 ictce-5.3.0 easyconfig (and patch required for it), is obsolete now libffi 3.0.13 is available
Merge pull request #516 from boegel/contrib_libffi-ictce-5.3.0

add ictce 5.3.0 easyconfig for libffi 3.0.13 and some stuff that depends on it