Merge "Allow building super.img on targets without...

Merge "Allow building super.img on targets without BOARD_BUILD_SUPER_IMAGE_BY_DEFAULT set." am: e8b97242

Original change: https://android-review.googlesource.com/c/platform/build/+/2147421



Change-Id: I4c24336e0079846d710ca8a0752408af9084f750
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>