libelf: Add a missing e_machine code for AARCH64 in libelf.

Change-Id: I717db208e77a66ed1e1c36a97167cbe6b0d6148e
diff --git a/0.153/libelf/elf.h b/0.153/libelf/elf.h
index 1d43deb..2b06377 100644
--- a/0.153/libelf/elf.h
+++ b/0.153/libelf/elf.h
@@ -254,6 +254,8 @@
 #define EM_XTENSA	94		/* Tensilica Xtensa Architecture */
 #define EM_NUM		95
 
+#define EM_AARCH64	183		/* ARM 64-bit */
+
 /* If it is necessary to assign new unofficial EM_* values, please
    pick large random numbers (0x8523, 0xa7f2, etc.) to minimize the
    chances of collision with official or non-GNU unofficial values.  */