TF: Update TF job to use bionic image when using ARMCLANG

Change-Id: If1dce6c2871536ad4c4a66659ba8127854fa5972
Signed-off-by: Benjamin Copeland <ben.copeland@linaro.org>
diff --git a/jenkins/build-config.jpl b/jenkins/build-config.jpl
index f57d0cd..60af3dd 100644
--- a/jenkins/build-config.jpl
+++ b/jenkins/build-config.jpl
@@ -11,7 +11,7 @@
 
 def nodeLabel = "docker-amd64-bionic"
 if (env.COMPILER == "ARMCLANG") {
-  nodeLabel = "docker-amd64-bionic-armclang"
+  nodeLabel = "docker-amd64-bionic"
 }
 
 node(nodeLabel) {