Fixing Android x64 build.

BUG= chromium:701590

Change-Id: Ia0a3a7a532a8acd001cb1dc79991f7cc08fc973d
Reviewed-on: https://chromium-review.googlesource.com/456456Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43873}

include/v8.h

@@ -7619,7 +7619,7 @@ class V8_EXPORT V8 {
    */
   static void ShutdownPlatform();
 
-#if V8_OS_LINUX && V8_TARGET_ARCH_X64
+#if V8_OS_LINUX && V8_TARGET_ARCH_X64 && !V8_OS_ANDROID
   /**
    * Give the V8 signal handler a chance to handle a fault.
    *

src/api.cc

@@ -6142,7 +6142,7 @@ bool v8::V8::Initialize() {
   return true;
 }
 
-#if V8_OS_LINUX && V8_TARGET_ARCH_X64
+#if V8_OS_LINUX && V8_TARGET_ARCH_X64 && !V8_OS_ANDROID
 bool V8::TryHandleSignal(int signum, void* info, void* context) {
   return v8::internal::trap_handler::TryHandleSignal(
       signum, static_cast<siginfo_t*>(info), static_cast<ucontext_t*>(context));