jammy-amd64-tf-a-build: Install ArmClang 6.18 in the image

This is first version which supports UBL licensing and thus required to
leverage it.

Also, the TF-A build process kinda requires 6.18, except for some reason,
it was worked around by linking to 6.17 instead, see revision
013f633fd1804.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I5ab7029a35abf0ba741de3a94ed4d01a59ca27ec
diff --git a/jammy-amd64-tf-a-build/tf-dependencies.install b/jammy-amd64-tf-a-build/tf-dependencies.install
index fd77003..4abcf81 100755
--- a/jammy-amd64-tf-a-build/tf-dependencies.install
+++ b/jammy-amd64-tf-a-build/tf-dependencies.install
@@ -66,6 +66,11 @@
 tar -xf /tmp/DS500-BN-00026-r5p0-19rel0.tar.gz -C /tmp/armclang-6.17
 /tmp/armclang-6.17/install_x86_64.sh --no-interactive --i-agree-to-the-contained-eula -d ${TOOLS_DIR}/armclang-6.17
 
+# Install Arm Clang 6.18 toolchain (armclang)
+mkdir -p /tmp/armclang-6.18
+tar -xf /tmp/ARMCompiler6.18_standalone_linux-x86_64.tar.gz -C /tmp/armclang-6.18
+/tmp/armclang-6.18/install_x86_64.sh --no-interactive --i-agree-to-the-contained-eula -d ${TOOLS_DIR}/armclang-6.18
+
 # Install the CUE data constraint language
 go install cuelang.org/go/cmd/cue@v0.5.0