toolchain/toolchain-external/toolchain-external-arm-aarch64: add toolchain for AArch64 host architecture

Enabling AArch64 as a host architecture for AArch64 build.

Signed-off-by: Gabriele Besta <buildroot@bgdev.it>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

toolchain/toolchain-external/toolchain-external-arm-aarch64/Config.in

@@ -1,7 +1,7 @@
 config BR2_TOOLCHAIN_EXTERNAL_ARM_AARCH64
 	bool "Arm AArch64 14.2.rel1"
 	depends on BR2_aarch64
-	depends on BR2_HOSTARCH = "x86_64"
+	depends on BR2_HOSTARCH = "x86_64" || BR2_HOSTARCH = "aarch64"
 	depends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_15
 	select BR2_TOOLCHAIN_EXTERNAL_GLIBC
 	select BR2_TOOLCHAIN_HAS_SSP

toolchain/toolchain-external/toolchain-external-arm-aarch64/toolchain-external-arm-aarch64.hash

@@ -1,2 +1,4 @@
 # From https://developer.arm.com/-/media/Files/downloads/gnu/14.2.rel1/binrel/arm-gnu-toolchain-14.2.rel1-x86_64-aarch64-none-linux-gnu.tar.xz.sha256asc
 sha256  47aeefc02b0ee39f6d4d1812110952975542d365872a7474b5306924bca4faa1  arm-gnu-toolchain-14.2.rel1-x86_64-aarch64-none-linux-gnu.tar.xz
+# From https://developer.arm.com/-/media/Files/downloads/gnu/14.2.rel1/binrel/arm-gnu-toolchain-14.2.rel1-aarch64-aarch64-none-linux-gnu.tar.xz.sha256asc
+sha256  299c56db1644c135670afabbf801b97a42e5ef6069d73157ab869458cbda2096  arm-gnu-toolchain-14.2.rel1-aarch64-aarch64-none-linux-gnu.tar.xz

toolchain/toolchain-external/toolchain-external-arm-aarch64/toolchain-external-arm-aarch64.mk

@@ -7,6 +7,6 @@
 TOOLCHAIN_EXTERNAL_ARM_AARCH64_VERSION = 14.2.rel1
 TOOLCHAIN_EXTERNAL_ARM_AARCH64_SITE = https://developer.arm.com/-/media/Files/downloads/gnu/$(TOOLCHAIN_EXTERNAL_ARM_AARCH64_VERSION)/binrel
 
-TOOLCHAIN_EXTERNAL_ARM_AARCH64_SOURCE = arm-gnu-toolchain-$(TOOLCHAIN_EXTERNAL_ARM_AARCH64_VERSION)-x86_64-aarch64-none-linux-gnu.tar.xz
+TOOLCHAIN_EXTERNAL_ARM_AARCH64_SOURCE = arm-gnu-toolchain-$(TOOLCHAIN_EXTERNAL_ARM_AARCH64_VERSION)-$(HOSTARCH)-aarch64-none-linux-gnu.tar.xz
 
 $(eval $(toolchain-external-package))