Include dist target to build the build metrics for the vendor inner
tree build.
Bug: 241033491
Test: development/multitree/build_vendor.sh -d vsoc_x86_64 \
-p cf_x86_64_phone -r out/dist -i %bid%
Change-Id: I7230fe2ee70eefad5e71cec7d5dc710f74f8c503