python3: move toolchain comment above main option

So suboptions are correctly indented.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python3/Config.in

@@ -1,3 +1,7 @@
+comment "python3 needs a toolchain w/ wchar, threads"
+	depends on BR2_USE_MMU
+	depends on !BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_THREADS
+
 config BR2_PACKAGE_PYTHON3
 	bool "python3"
 	depends on !BR2_PACKAGE_PYTHON
@@ -11,10 +15,6 @@ config BR2_PACKAGE_PYTHON3
 
 	  http://www.python.org/
 
-comment "python3 needs a toolchain w/ wchar, threads"
-	depends on BR2_USE_MMU
-	depends on !BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_THREADS
-
 if BR2_PACKAGE_PYTHON3
 
 choice