harfbuzz is using the 'Modern Variants' of MIT License:
https://fedoraproject.org/wiki/Licensing:MIT?rd=Licensing/MIT#Modern_Variants
We can update the LICENSE as 'MIT & ICU'.
Fixes this warning:
WARNING: harfbuzz: No generic license file exists for: Old-MIT in any provider
WARNING: harfbuzz: No generic license file exists for: UCDN in any provider
WARNING: harfbuzz: No generic license file exists for: HarfBuzz-old in any provider
Signed-off-by: Maxin B. John <maxin.john@enea.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
