arm-toolchain/external-arm-toolchain: rename common include

These recipes all used a common include
external-arm-toolchain-x86host.inc, but that name isn't very meaningful:
the recipes are for x86-64, there typically are more than x86-64
binaries available, and it's not for an external toolchain but
integrating a binary toolchain.

Rename the include to arm-binary-toolchain.inc, as they're all the Arm
binary toolchain.

Change-Id: I59f5faa7373686958e226db0aa68e7880d36400e
Signed-off-by: Ross Burton <ross.burton@arm.com>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-toolchain/recipes-devtools/external-arm-toolchain/armcompiler_6.13.bb

@@ -3,7 +3,7 @@
 # Copyright (c) 2020 Arm Limited
 #
 
-require external-arm-toolchain-x86host.inc
+require arm-binary-toolchain.inc
 
 SUMMARY = "Baremetal Armcompiler for Cortex-A, Cortex-R and Cortex-M processors"
 HOMEPAGE = "https://developer.arm.com/tools-and-software/embedded/arm-compiler/downloads/version-6"

meta-arm-toolchain/recipes-devtools/external-arm-toolchain/gcc-aarch64-none-elf_9.2-2019.12.bb

@@ -1,7 +1,7 @@
 # Copyright (C) 2020 Texas Instruments Inc.
 # Released under the MIT license (see COPYING.MIT for the terms)
 
-require external-arm-toolchain-x86host.inc
+require arm-binary-toolchain.inc
 
 SUMMARY = "Baremetal GCC for Aarch64 processors"
 LICENSE = "GPL-3.0-with-GCC-exception & GPLv3"

meta-arm-toolchain/recipes-devtools/external-arm-toolchain/gcc-arm-none-eabi_9-2019-q4-major.bb

@@ -1,7 +1,7 @@
 # Copyright (C) 2019 Garmin Ltd. or its subsidiaries
 # Released under the MIT license (see COPYING.MIT for the terms)
 
-require external-arm-toolchain-x86host.inc
+require arm-binary-toolchain.inc
 
 SUMMARY = "Baremetal GCC for ARM-R and ARM-M processors"
 LICENSE = "GPL-3.0-with-GCC-exception & GPLv3"