refactor(debos/flash): Use new ptool build id flag

Recent ptool versions support passing the build-id when generating
contents.xml files, drop our custom logic.

Signed-off-by: Loïc Minier <loic.minier@oss.qualcomm.com>

Author: lool

debos-recipes/qualcomm-linux-debian-flash.yaml

@@ -294,14 +294,8 @@ actions:
           if [ -e "$contents" ]; then
               "${QCOM_PTOOL}/gen_contents.py" -p ptool-partitions.xml \
                   -t "$contents" \
+                  -b "{{$buildid}}" \
                   -o contents.xml
-              # XXX insert build_id element before windows_root_path;
-              # this will be nicer to do when gen_contents.py supports
-              # setting this; see also:
-              # https://github.com/qualcomm-linux/qcom-ptool/pull/38
-              sed -i \
-                  "/windows_root_path/ i \t\t\t\t<build_id>{{$buildid}}</build_id>" \
-                  contents.xml
           fi
           # generate flashing files from qcom-partitions.xml
           "${QCOM_PTOOL}/ptool.py" -x ptool-partitions.xml