Makefile.common: fix promu download path for arm32 (#4998)
Makefile.common: fix promu download path for arm32 (#4998)

Signed-off-by: Paul Gier <02c55f18a892b365bcd1802db9e5c9df39c04674@redhat.com>
GoogleCloudPlatform/prometheus,prometheus/prometheus,alileza/prometheus,keegancsmith/prometheus,alileza/prometheus,keegancsmith/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,kangwoo/prometheus,kangwoo/prometheus,prometheus/prometheus,keegancsmith/prometheus,prometheus/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,Gouthamve/prometheus,alileza/prometheus,Gouthamve/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus,kangwoo/prometheus,Gouthamve/prometheus,prometheus/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,kangwoo/prometheus