distro.conf: add VIRTUAL-RUNTIME_mountpoint
distro.conf: add VIRTUAL-RUNTIME_mountpoint

util-linux, sysvinit, and busybox are all capable of providing
mountpoint; add a VIRTUAL-RUNTIME_mountpoint in order to switch
runtime dependencies between the three at build time.

Initially done by R.Tollerton, moved from OE-core (Ionel)

Natinst-Reviewboard-ID: 111410
Natinst-CAR-ID: 545515

Signed-off-by: Ioan-Adrian Ratiu <7ec73abcfe099fc5574c01312b62768070c80980@ni.com>
Signed-off-by: Richard Tollerton <rich.tollerton@ni.com>
Reviewed-by: Ken Sharp <ken.sharp@ni.com>

Signed-off-by: Ioan-Adrian Ratiu <7ec73abcfe099fc5574c01312b62768070c80980@ni.com>

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt