AArch64: Add support for AArch64 to stdlib/strtod.c

This patch adds support for AArch64 to strtod.c definitions.

Change-Id: I9491c4371d921c00e73ae169877a9a71225731fb
Signed-off-by: Serban Constantinescu <serban.constantinescu@arm.com>
diff --git a/libc/stdlib/strtod.c b/libc/stdlib/strtod.c
index ab637a1..3934d9a 100644
--- a/libc/stdlib/strtod.c
+++ b/libc/stdlib/strtod.c
@@ -107,7 +107,7 @@
     defined(__mips__) || defined(__ns32k__) || defined(__alpha__) || \
     defined(__powerpc__) || defined(__sh__) || defined(__x86_64__) || \
     defined(__hppa__) || \
-    (defined(__arm__) && defined(__VFP_FP__))
+    (defined(__arm__) && defined(__VFP_FP__)) || defined(__aarch64__)
 #include <endian.h>
 #if BYTE_ORDER == BIG_ENDIAN
 #define IEEE_BIG_ENDIAN