Add tiogapass to build target

Added Facebook tiogapass to build target along with LAYER directory.

Change-Id: I46a04234a028400738515df09977f13c1c8c4fcc
Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
diff --git a/build-setup.sh b/build-setup.sh
index c1e888d..1550af6 100755
--- a/build-setup.sh
+++ b/build-setup.sh
@@ -35,7 +35,7 @@
 #                     Default: "latest"
 #  target             The target we aim to build:
 #                     evb-ast2500|palmetto|qemu|qemux86-64
-#                     romulus|s2600wf|witherspoon|zaius
+#                     romulus|s2600wf|witherspoon|zaius|tiogapass
 #                     Default: "qemu"
 #
 # Deployment Variables:
@@ -159,6 +159,9 @@
     # MACHINE defaults to `qemuarm` in this layer, change to `qemux86-64`
     MACHINE="qemux86-64"
     ;;
+  tiogapass)
+    LAYER_DIR="meta-facebook/meta-tiogapass"
+    ;;
   *)
     exit 1
     ;;