`m <module>` builds default output files as well

`m <module>` previously only built the installed files and the
checkbuilded files. Also build the output files, because some modules
like genrules don't have any installed/checkbuilded files, only output
files, so before, they weren't able to be built with `m <module>`

Bug: 376727180
Test: m trusty-x86_64.lk.elf.gen
Change-Id: I8f4ce48f2c6c493b8a624b3be7b5238008272f90