Shush minor stdout noise on builds

hack/lib/golang.sh

@@ -364,12 +364,12 @@ kube::golang::build_binaries_for_platform() {
     # Go 1.4 added -o to control where the binary is saved, but Go 1.3 doesn't
     # have this flag. Whenever we deprecate go 1.3, update to use -o instead of
     # changing into the output directory.
-    pushd "$(dirname ${outfile})"
+    pushd "$(dirname ${outfile})" >/dev/null
     go test -c \
       "${goflags[@]:+${goflags[@]}}" \
       -ldflags "${version_ldflags}" \
       "$(dirname ${test})"
-    popd
+    popd >/dev/null
   done
 }