Bug 1480392 - fix searchfox build failures caused by missing node toolchain, r=gps

MozReview-Commit-ID: BK1QztxbvN6

--HG--
extra : rebase_source : a53d118ade75ffb59c66abe5f1b5597b975d7fbf

taskcluster/ci/searchfox/kind.yml

@@ -46,6 +46,7 @@ jobs:
             keep-artifacts: false
         toolchains:
             - linux64-clang
+            - linux64-node
             - linux64-rust
 
     macosx64-searchfox/debug:
@@ -77,6 +78,7 @@ jobs:
             - linux64-hfsplus
             - linux64-libdmg
             - linux64-llvm-dsymutil
+            - linux64-node
             - linux64-rust-macos
 
     # NOTE: Windows Searchfox jobs aren't working quite yet (bug 1418415).
@@ -105,4 +107,5 @@ jobs:
                 - builds/taskcluster_sub_win64/searchfox_debug.py
         toolchains:
             - win64-clang-cl
+            - win64-node
             - win64-rust