zdtm: Use predefined macro from nmk

We better should switch to nmk usage.
But lets c/p for now.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/zdtm/Makefile.inc

-ARCH ?= $(shell uname -m | sed		\
-		-e s/i.86/i386/		\
-		-e s/sun4u/sparc64/	\
-		-e s/arm.*/arm/		\
-		-e s/sa110/arm/		\
-		-e s/s390x/s390/	\
-		-e s/parisc64/parisc/	\
-		-e s/mips.*/mips/	\
-		-e s/sh[234].*/sh/)
+ARCH ?= $(shell uname -m | sed          \
+                -e s/i.86/x86/          \
+                -e s/x86_64/x86/        \
+                -e s/sun4u/sparc64/     \
+                -e s/arm.*/arm/         \
+                -e s/sa110/arm/         \
+                -e s/s390x/s390/        \
+                -e s/parisc64/parisc/   \
+                -e s/ppc64.*/ppc64/     \
+                -e s/mips.*/mips/       \
+                -e s/sh[234].*/sh/      \
+                -e s/aarch64.*/arm64/)
 
-SRCARCH ?= $(ARCH)
-
-ifeq ($(ARCH),i386)
-	SRCARCH := x86
+ifeq ($(ARCH),arm64)
+        ARCH		?= aarch64
+        SRCARCH		?= aarch64
 endif
 
-ifeq ($(ARCH),x86_64)
-	SRCARCH := x86
-endif
+SRCARCH ?= $(ARCH)
 
 CPPFLAGS += -iquote $(LIBDIR)/arch/$(SRCARCH)/include