A previous CL switched gobind to use the "source" importer so go files using cgo can be type checked. However, CGO_ENABLED=1 also have to be passed in for such files not be ignored. Also add -tags ios to the gomobile test output missing from CL 99777. Fixes golang/go#24941 Change-Id: I868469af3061b82ab592899e365a8a90a0333e58 Reviewed-on: https://go-review.googlesource.com/108336 Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>