Fix str test.

Handle case where test segfaults (fail on *any* non-zero exit)

headers-only)

bug!

example.

compile.

files.

Also, fixed "Archieve" typo in header (Thanks Tim Connors)

more polish (particularly uploading is untested).

Note that this gets a superset of dependencies, eg:

  rusty@vivaldi$ tools/ccan_depends ccan/check_type
  ccan/build_assert
  rusty@vivaldi$ tools/ccan_depends --compile ccan/check_type
  rusty@vivaldi$