(maint) fixes for shimgen
(maint) fixes for shimgen

- sometimes shimgen has not been able to find csc.exe to generate the
shim.

Apteryx0/choco,jberezanski/choco,jberezanski/choco,jberezanski/choco,bazzilic/choco,TheBigBear/choco,TheBigBear/choco,bazzilic/choco,Apteryx0/choco,TheBigBear/choco