Add Azure DevOps pipelines for ThreadX test

scripts/install.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+#
+# Install necessary softwares for Ubuntu.
+
+apt-get update
+apt-get install -y \
+    gcc-multilib \
+    git \
+    g++ \
+    python3-pip \
+    ninja-build \
+    unifdef \
+    p7zip-full \
+    tofrodos \
+    gawk \
+    cmake \
+    software-properties-common
+
+python3 -m pip install --upgrade pip
+pip3 install artifacts-keyring
+pip3 install gcovr==4.1 $INDEX_URL
+