* Rework submodule installation
- use add_subdirectory(... EXCLUDE_FROM_ALL) + explicit installation of deps
- install all library deps to lib/omnitrace
- internal builds of dyninst use libomnitrace-rt for binary rewriting
- support libdyninstAPI_RT not in LD_LIBRARY_PATH when dyninst built internally
* Update ubuntu-focal to test full dyninst install
* Use RelWithDebInfo because Dyninst segfaults with MinSizeRel
* Fix ubuntu-focal.yml install step
Jonathan R. Madsen
fadcfa36da