makepkg: add check to ensure we have non-URL files in build dir

Pacman 3.0 printed the following message if a file could not be found:
  ERROR: xxx was not found in the build directory and is not a proper URL.

We lost this logic in 3.1 when moving to the DLAGENT type stuff, so a
not-found file got passed all the way to the download logic where it failed
with a odd error message. Bring back some logic to ensure only files with
URLs get past a certain point, and fail if the file is not available.

Fixes FS#9208.

Signed-off-by: Dan McGee <dan@archlinux.org>

0 files changed, 0 insertions, 0 deletions