makepkg: use builtin globbing to print files in package

- it comes with free collation when moving the LC_ALL declaration up a bit;
  this fixes a bug where the .FILES were not being properly sorted and
  their order depended on directory creation order, which broke
  reproducible builds in the wild.
- it handles sorting null-delimited output everywhere, without sort -z;
  this lets us get rid of sed hacks
- it is faster than invoking multiple find subprocesses
- dotfiles can be automatically printed *and the C locale sorts them first*
  with a single ** glob

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>

scripts/makepkg.sh.in

@@ -708,8 +708,11 @@ write_buildinfo() {
 # database files are placed at the beginning of the package regardless of
 # sorting
 list_package_files() {
-	(find . -path './.*' \! -name '.'; find . \! -path './.*' \! -name '.' | LC_ALL=C sort) |
-	sed -e 's|^\./||' | tr '\n' '\0'
+	(
+		export LC_COLLATE=C
+		shopt -s dotglob globstar
+		printf '%s\0' **
+	)
 }
 
 create_package() {