rune: Fix static compilation error
`make static` should depend on *.pb.go files.
@@ -47,7 +47,7 @@ skeleton: libenclave/internal/runtime/pal/skeleton/liberpal-skeleton.so
libenclave/internal/runtime/pal/skeleton/liberpal-skeleton.so:
make -C libenclave/internal/runtime/pal/skeleton
-static:
+static: $(PROTOS)
$(GO_BUILD_STATIC) -o rune .
$(GO_BUILD_STATIC) -o contrib/cmd/recvtty/recvtty ./contrib/cmd/recvtty
