test-many-klibcs: Build out-of-tree and don't clean every time

Out-of-tree builds are working again.  We can build for each tested
architecture in a separate directory and then don't need to clean
between builds.
2 files changed
tree: 314ea98ef694fb1b1bef684a19b509adb03aa53f
  1. .gitignore
  2. newklibc
  3. test-many-klibcs