Sort package manifests under LC_ALL=C

pkg-snapshot and dots used plain sort, which is locale-dependent: the same
package set ordered differently on two machines, so dots reported drift
that did not exist. A maintenance tool that always cries wolf is the exact
failure mode dots exists to avoid.

common/bin/dots

@@ -19,10 +19,10 @@ fi
 pkgdrift=0
 tmp=$(mktemp)
 if command -v pacman >/dev/null 2>&1; then
-  pacman -Qqen | sort > "$tmp"
+  pacman -Qqen | LC_ALL=C sort > "$tmp"
   [[ -f "packages/${HOST}.pacman" ]] && ! diff -q "$tmp" "packages/${HOST}.pacman" >/dev/null && pkgdrift=1
 elif command -v apt-mark >/dev/null 2>&1; then
-  apt-mark showmanual | sort > "$tmp"
+  apt-mark showmanual | LC_ALL=C sort > "$tmp"
   [[ -f "packages/${HOST}.apt" ]] && ! diff -q "$tmp" "packages/${HOST}.apt" >/dev/null && pkgdrift=1
 fi
 rm -f "$tmp"