add ignores for clover files.
add ignores for clover files.

cgruber/truth,andyglick/truth0,dsaff/truth-old,dahlstrom-g/truth,dahlstrom-g/truth,hcoles/truth,kidaa/truth,google/truth,google/truth,google/truth,hcoles/truth,cgruber/truth,kidaa/truth,andyglick/truth0,dsaff/truth-old