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realemu: fix cpuid

ECX and EDX were incorrectly swapped.

Ref: http://wiki.osdev.org/CPUID

thanks Anthony Martin <ality@pbrane.org> for sending the patch!

--- a/sys/src/cmd/aux/realemu/xec.c

+++ b/sys/src/cmd/aux/realemu/xec.c

@@ -932,9 +932,9 @@

 	} tab[] = {

 		0,

 			5,

-			0x756e6547,

-			0x49656e69,

-			0x6c65746e,

+			0x756e6547, /* Genu */

+			0x6c65746e, /* ntel */

+			0x49656e69, /* ineI */

 		1,

 			4<<8,

 			0x00000000,

-- 

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