icecc-create-env: Add extra tools option

It can often be useful to include additional debugging tools the
toolchain such as strace. Add an option to include an arbitrary path.

(From OE-Core rev: 1fc1e3d59afd292ff8f7c4e1f64324134b73b8f4)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/icecc-create-env/icecc-create-env/icecc-create-env

@@ -197,6 +197,9 @@ while test -n "$1"; do
         --log)
             do_log=1
             ;;
+        --extra=*)
+            extra_tools="$extra_tools ${1#--extra=}"
+            ;;
         *)
             break
             ;;
@@ -284,6 +287,15 @@ else
     exit 1
 fi
 
+for extra in $extra_tools; do
+    if test -x "$extra"; then
+        add_file "$extra"
+    else
+        print_output "'$extra' not found"
+        exit 1
+    fi
+done
+
 link_rel ()
 {
     local target="$1"