build: Generate compile_commands.py

Those using a language server benefit by having compile_commands.py
being re-generated on builds to ensure the right set of build flags are
being used. Generate the same on each build. While this could be made
optional, the script to generate the same runs almost instantly.

Author: rnav

build/scripts/container-build.sh

@@ -128,6 +128,8 @@ if [[ "$1" == "kernel" ]]; then
 
     echo "## Kernel build completed rc = $rc"
 
+    /linux/scripts/clang-tools/gen_compile_commands.py -o /output/compile_commands.json /output > /dev/null 2>&1 || true
+
     if [[ -f /output/vmlinux ]]; then
         size /output/vmlinux
     fi