compel/tests: fix tests on !x86 archs

Add missing string.h include for memcpy(),
add extern __run_tests from handle_binary.o.

Fixes: commit 67526eb51ecf ("compel: add tests for compel").

Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

test/compel/arch/aarch64/include/arch_test_handle_binary.h

 #ifndef __ARCH_TEST_HANDLE_BINARY__
 #define __ARCH_TEST_HANDLE_BINARY__
 
+#include <string.h>
+
 #include "uapi/elf64-types.h"
 #define arch_run_tests(mem) __run_tests(mem, "")
+extern int __run_tests(void *mem, const char *msg);
 
 static __maybe_unused void arch_test_set_elf_hdr_ident(void *mem)
 {

test/compel/arch/arm/include/arch_test_handle_binary.h

 #ifndef __ARCH_TEST_HANDLE_BINARY__
 #define __ARCH_TEST_HANDLE_BINARY__
 
+#include <string.h>
+
 #include "uapi/elf32-types.h"
 #define arch_run_tests(mem) __run_tests(mem, "")
+extern int __run_tests(void *mem, const char *msg);
 
 static __maybe_unused void arch_test_set_elf_hdr_ident(void *mem)
 {

test/compel/arch/ppc64/include/arch_test_handle_binary.h

 #ifndef __ARCH_TEST_HANDLE_BINARY__
 #define __ARCH_TEST_HANDLE_BINARY__
 
+#include <string.h>
+
 #include "uapi/elf64-types.h"
 #define arch_run_tests(mem) __run_tests(mem, "")
+extern int __run_tests(void *mem, const char *msg);
 
 static __maybe_unused void arch_test_set_elf_hdr_ident(void *mem)
 {