m/t/installer: stream qemu output in harness

This allows the installer to hang forever in error cases instead of
having to reboot.

Change-Id: I328524727718e160ae8d6928b6d8b4921f7e036f
Reviewed-on: https://review.monogon.dev/c/monogon/+/490
Reviewed-by: Mateusz Zalega <mateusz@monogon.tech>
diff --git a/metropolis/test/installer/BUILD.bazel b/metropolis/test/installer/BUILD.bazel
index 5763d75..df62c1c 100644
--- a/metropolis/test/installer/BUILD.bazel
+++ b/metropolis/test/installer/BUILD.bazel
@@ -22,6 +22,7 @@
     deps = [
         "//metropolis/cli/metroctl/core:go_default_library",
         "//metropolis/node/build/mkimage/osimage:go_default_library",
+        "//metropolis/pkg/logbuffer:go_default_library",
         "//metropolis/proto/api:go_default_library",
         "@com_github_diskfs_go_diskfs//:go_default_library",
         "@com_github_diskfs_go_diskfs//disk:go_default_library",