Hi,
Linaro-android builds are "NOT_BUILT" :

https://android-build.linaro.org/jenkins/job/linaro-android-member-ti_panda-linaro/297/console

the problem seems to be with infrastructure :

fatal: branch 'stable' has not been signed
++ infrastructure_error
++ echo 'Caught infrastructure error - finishing build with '\''Not Built'\'' status'
Caught infrastructure error - finishing build with 'Not Built' status
++ exit 123
Build step 'Execute shell and set build status' changed build result to NOT_BUILT
Build step 'Execute shell and set build status' marked build as failure
Archiving artifacts
Recording fingerprints
Email was triggered for: Not Built
Sending email for trigger: Not Built
Sending email to: linaro-android-builders@linaro.org 
Finished: NOT_BUILT

would you please look into the issue for our QA weekly tests.

Thanks & Regards
Soumya Basak.