Bug 1720483 - Follow-up: Add x86_64 sysroot to linux64-aarch64 build for host utils. r=justdave

Differential Revision: https://phabricator.services.mozilla.com/D120120

--HG--
extra : amend_source : a38374ec16d582f03f20e8ae71f4a16f32d3e669

taskcluster/ci/build/linux.yml

@@ -265,7 +265,6 @@ linux64-aarch64/opt:
     fetches:
         toolchain:
             - linux-aarch64-libotr
-            - sysroot-aarch64-linux-gnu
             - linux64-binutils
             - linux64-cbindgen
             - linux64-clang-aarch64-cross
@@ -274,6 +273,8 @@ linux64-aarch64/opt:
             - linux64-rust
             - linux64-rust-size
             - linux64-sccache
+            - sysroot-aarch64-linux-gnu
+            - sysroot-x86_64-linux-gnu
 
 linux/opt:
     description: "Linux32 Opt"