Support more cross-build platforms
Support more cross-build platforms

Kellel/alertmanager,brancz/alertmanager,GoogleCloudPlatform/alertmanager,brancz/alertmanager,tyrken/alertmanager,tinytub/alertmanager,tinytub/alertmanager,brunoqc/alertmanager,Kellel/alertmanager,prometheus/alertmanager,GoogleCloudPlatform/alertmanager,ericgerling/alertmanager,tbouvet/alertmanager,ericgerling/alertmanager,Aloomaio/alertmanager,ericgerling/alertmanager,joehandzik/alertmanager,brancz/alertmanager,GoogleCloudPlatform/alertmanager,tyrken/alertmanager,Aloomaio/alertmanager,prometheus/alertmanager,brunoqc/alertmanager,brancz/alertmanager,tbouvet/alertmanager,prometheus/alertmanager,tinytub/alertmanager,Kellel/alertmanager,Aloomaio/alertmanager,joehandzik/alertmanager,tyrken/alertmanager,joehandzik/alertmanager,tbouvet/alertmanager,prometheus/alertmanager,brunoqc/alertmanager,GoogleCloudPlatform/alertmanager,brunoqc/alertmanager,tyrken/alertmanager