Exclude go protobuf stubs from license check

Change-Id: Iaccd9a0b63cfdbd744c33a7d2d9a6c60459813fb
diff --git a/jjb/shell/licensecheck.sh b/jjb/shell/licensecheck.sh
index 977495c..0eb26ea 100755
--- a/jjb/shell/licensecheck.sh
+++ b/jjb/shell/licensecheck.sh
@@ -66,6 +66,7 @@
   ! -name "*.oar" \
   ! -name "*.p12" \
   ! -name "*.patch" \
+  ! -name "*.pb.go" \
   ! -name "*.pdf" \
   ! -name "*.pcap" \
   ! -name "*.pem" \