Suppress warnings from combine.py when processing data/compounds-auto

[BOBSINM]

During make (build) process the following warnings are reported by combine.py importing data/compounds-auto:

data/compounds-auto... warning: _: bowleg : could not find match: skipping group
warning: _: bypast : could not find match: skipping group
warning: _v: co-ordinated : could not find match: skipping group
warning: _v: dropkick : could not find match: skipping group
warning: _: flatfoot : could not find match: skipping group
warning: _.: hagridden : could not find match: skipping group
warning: _?: hee-haw : could not find match: skipping group
warning: _=: home-brewed : could not find match: skipping group
warning: _: knockdown : could not find match: skipping group
warning: _: lightface : could not find match: skipping group
warning: _: multistage : could not find match: skipping group
warning: _: nighttime : could not find match: skipping group
warning: _: noncontributory : could not find match: skipping group
warning: _: nonmetal : could not find match: skipping group
warning: _: nonstop : could not find match: skipping group
warning: _: northeastward : could not find match: skipping group
warning: _: northwestward : could not find match: skipping group
warning: _: peacekeeping : could not find match: skipping group
warning: _: pigsticking : could not find match: skipping group
warning: _: postdoctoral : could not find match: skipping group
warning: _.: preempt : could not find match: skipping group
warning: _v: re-formed : could not find match: skipping group
warning: _: shortwave : could not find match: skipping group
warning: _: southeastward : could not find match: skipping group
warning: _: southwestward : could not find match: skipping group
warning: _: splayfoot : could not find match: skipping group
warning: _.: thickheaded : could not find match: skipping group
warning: _v: timeserving : could not find match: skipping group
warning: _.: weatherstrip : could not find match: skipping group
warning: _: whiteout : could not find match: skipping group
warning: _: womanlike : could not find match: skipping group
warning: _: woolgathering : could not find match: skipping group

[kevina]

These are normal and expected.

I should likely just suppresses them, but it is low on my TODO list.