python3targetconfig: Use for nativesdk too

nativesdk is a cross compiled target and therefore should use the target
config, not the native one. Copy the target entries accordingly.

(From OE-Core rev: b1b5fec350b390fa7f2d26966df1411b032faf87)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/python3targetconfig.bbclass

@@ -15,3 +15,15 @@ do_compile:prepend:class-target() {
 do_install:prepend:class-target() {
         export _PYTHON_SYSCONFIGDATA_NAME="_sysconfigdata"
 }
+
+do_configure:prepend:class-nativesdk() {
+        export _PYTHON_SYSCONFIGDATA_NAME="_sysconfigdata"
+}
+
+do_compile:prepend:class-nativesdk() {
+        export _PYTHON_SYSCONFIGDATA_NAME="_sysconfigdata"
+}
+
+do_install:prepend:class-nativesdk() {
+        export _PYTHON_SYSCONFIGDATA_NAME="_sysconfigdata"
+}