Merge pull request #20 from ncw/fix-generator-script

Fixup generator script on ubuntu 17.04

Author: diwakergupta

generator/generate-sdk.sh

@@ -20,6 +20,7 @@ pushd ${spec_dir}
 spec_version=$(git rev-parse --short HEAD)
 popd
 
-sed -i '' -e "s/UNKNOWN SDK VERSION/${sdk_version}/" \
-	-e "s/UNKNOWN SPEC VERSION/${spec_version}/" ${gen_dir}/sdk.go
+sed -i.bak -e "s/UNKNOWN SDK VERSION/${sdk_version}/" \
+    -e "s/UNKNOWN SPEC VERSION/${spec_version}/" ${gen_dir}/sdk.go
+rm ${gen_dir}/sdk.go.bak
 goimports -l -w ${gen_dir}