[Patch, libstdc++.exp]Update the usage of cached result, rebuild nlocale wrapper for each variant.

[Jonathan Wakely]

Hi, I've just noticed this in your r266209 change from November:

On 16/11/18 10:42 +0000, Renlin Li wrote:
>+    return [check_v3_target_prop_cached et_parallel_mode {
>+	global cxxflags
>+	global v3-libgomp
> 	# If 'make check-parallel' is running the test succeeds.
> 	if { ${v3-libgomp} == 1 && [regexp "libgomp" $cxxflags] } {
>-	    set et_parallel_mode 1
>+	    return1 1

Is this a typo? It should be "return 1" not "return1 1" right?