message: Update location for x86_64 android build
  See
diff: @@ -300,7 +300,7 @@ ifeq ($(TARGET),ANDROID)
  ifeq ($(ANDROID_ARCH),x86_64)
  TOOLCHAIN := x86_64-4.9
  SYSROOT_ARCH := x86_64
  - BIN_PREFIX := x86-64-linux-android
  + BIN_PREFIX := x86_64-linux-android
  MARCH_OPTION :=
  endif
  