runtests.sh: build tests all together instead of one by one
Instead of building each test just before running it, build all
the tests together and then run them all together. This has two
advantages:
1. Building is faster because we don't have to start up soong and
parse the ninja files for each test but only do it once at the
beginning.
2. Test results appear all together and are easier to see in the
scrollback buffer.
Test: ./system/netd/tests/runtests.sh
Test: ./system/netd/tests/runtests.sh unit
Test: ./system/netd/tests/runtests.sh utils
Change-Id: I3bb38aae5a1c05dca6a8bdbfbc98ed736854c96e
1 file changed
