rcs: makedepends on ed
rcs: makedepends on ed

Configure looks for it, but the comment says it's only needed if diff3
isn't 'sane'.  Since our diff3 is GNU diff3, it is 'sane', so ed isn't
required at runtime, but configure still checks for it so make it a
makedepends.

juergenpf/MSYS2-packages,Alexpux/MSYS2-packages,atom2013/MSYS2-packages,Alexpux/MSYS2-packages,waterlan/MSYS2-packages,mati865/MSYS2-packages,juergenpf/MSYS2-packages,juergenpf/MSYS2-packages,atom2013/MSYS2-packages,waterlan/MSYS2-packages,juergenpf/MSYS2-packages,JPeterMugaas/MSYS2-packages,juergenpf/MSYS2-packages,atom2013/MSYS2-packages,atom2013/MSYS2-packages,Alexpux/MSYS2-packages,JPeterMugaas/MSYS2-packages,waterlan/MSYS2-packages,Alexpux/MSYS2-packages,JPeterMugaas/MSYS2-packages,mati865/MSYS2-packages,JPeterMugaas/MSYS2-packages,waterlan/MSYS2-packages,mati865/MSYS2-packages,mati865/MSYS2-packages