qemu: reduce logspam for qemu runner #2845

Job	Run time
Build melange and add to artifact cache	42s
Build packages (bubblewrap, hello-wolfi)	1m 37s
Build packages (bubblewrap, glibc)	13m 42s
Build packages (bubblewrap, tini)	1m 11s
Build packages (bubblewrap, lzo)	1m 31s
Build packages (bubblewrap, bubblewrap)	1m 11s
Build packages (bubblewrap, gitsign)	2m 55s
Build packages (bubblewrap, guac)	3m 51s
Build packages (bubblewrap, mdbook)	3m 46s
Build packages (bubblewrap, s3cmd)	1m 6s
Build packages (bubblewrap, perl-yaml-syck)	1m 40s
Build packages (bubblewrap, ncurses)	2m 37s
Build packages (qemu, hello-wolfi)	2m 10s
Build packages (qemu, glibc)	14m 29s
Build packages (qemu, tini)	1m 55s
Build packages (qemu, lzo)	2m 4s
Build packages (qemu, bubblewrap)	2m 43s
Build packages (qemu, gitsign)	3m 54s
Build packages (qemu, guac)	5m 11s
Build packages (qemu, mdbook)	4m 28s
Build packages (qemu, s3cmd)	1m 37s
Build packages (qemu, perl-yaml-syck)	1m 43s
Build packages (qemu, ncurses)	2m 58s
	1h 19m 1s

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