CI: build a proper TC0 image on x86-64

Change-Id: Id3da3b6efd620c2052ef59dc731e4b159830e805
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

.gitlab-ci.yml

@@ -186,9 +186,13 @@ sgi575:
 
 tc0:
   extends: .build
+  tags:
+    - x86_64
 
 tc1:
   extends: .build
+  tags:
+    - x86_64
 
 toolchains:
   extends: .build

ci/tc0.yml

@@ -4,3 +4,7 @@ header:
     - base.yml
 
 machine: tc0
+
+target:
+  - tc-artifacts-image
+  - perf

ci/tc1.yml

@@ -4,3 +4,7 @@ header:
     - base.yml
 
 machine: tc1
+
+target:
+  - tc-artifacts-image
+  - perf