ci: distro: build qcom-multimedia-image as default target

meta-qcom-distro default build configuration should build
qcom-multimedia-image by default, as that is the standard distro image
we expect to support there.

Signed-off-by: Ricardo Salveti <[email protected]>

Author: ricardosalveti

ci/distro.yml

@@ -19,3 +19,6 @@ repos:
       meta-oe:
       meta-python:
       meta-xfce:
+
+target:
+  - qcom-multimedia-image