check PV of virtual ebuilds

We want people to follow the guidelines for the right PV value to use
when creating virtuals that boards will be able to override.

TEST=`./` passes
TEST=uploaded a few CLs with bad PVs & good PVs and checked behavior

Change-Id: Ie514a6b316465939498593c22fb7ca5f74972f01
Reviewed-by: David James <>
Tested-by: Mike Frysinger <>
2 files changed