fix(sys-apps/kexec-tools) remove 2.0.99 ebuild

The "normal" kexec ebuild works properly, so the 2.0.99 ebuild can be
removed, and masked away.
Merge pull request #99 from gregkh/kexec

fix(sys-apps/kexec-tools) remove 2.0.99 ebuild
fix(package.mask) properly mask the kexec-tools-2.0.99 ebuild
Merge pull request #100 from gregkh/kexec

fix(package.mask) properly mask the kexec-tools-2.0.99 ebuild