jammy-amd64-tf-a-build: ninja, gn and dtc

Install ninja-build, gn and the device-tree-compiler.

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: Ieb8e505283519d5c951bf84c4b3beee3afbcb436
diff --git a/jammy-amd64-tf-a-build/Dockerfile b/jammy-amd64-tf-a-build/Dockerfile
index dad94e8..9d580f4 100644
--- a/jammy-amd64-tf-a-build/Dockerfile
+++ b/jammy-amd64-tf-a-build/Dockerfile
@@ -31,6 +31,9 @@
     golang-go \
     graphviz \
     jq \
+    ninja-build \
+    gn \
+    device-tree-compiler \
     lcov \
     libffi-dev \
     libyaml-dev \