pkg.sh: Fix chown and chmod lines in generated postinst

The postinst generator looks up the install log line of each file with a
regex grep on the file path, and the dots of the path match any character.
When the grep returns several lines, milk_install_log_spec_attr() passes
the extra lines through, so the emitted chown and chmod commands split
across lines, dpkg -i reports errors for the fragments, and the owner and
mode of the file are not applied.

Match the end of the log line against the file path literally and take the
first match. The install log line ends in the file path, but may carry a
build prefix before it, so the literal comparison of the tail of the line
selects exactly the line of the file, for plain and %config entries alike.

Assisted-by: unsloth/Qwen3.8-27B-GGUF:Q4_K_M with pi.dev v1.4.0
Signed-off-by: Jan Lindemann <jan@janware.com>

scripts/pkg.sh

@@ -1088,7 +1088,11 @@ cmd_milk_install_log()
 							file=`echo /$file | sed 's/inst-root\///; s%^//*%/%'`
 							#echo file is now \"$file\" >&2
 							#echo grep \"$prefix/*$file$\" $in >&2
-							line=`grep $file$ $in`
+							# match the end of the log line against
+							# the file path literally; the line may
+							# carry a prefix before the path, and a
+							# regex grep lets dots match other lines
+							line=`awk -v f="$file" '{ if (substr($0, length($0) - length(f) + 1) == f) print }' $in | head -n 1`
 							perm=`milk_install_log_spec_attr 1 "$line"`
 							owner=`milk_install_log_spec_attr 2 "$line"`
 							group=`milk_install_log_spec_attr 3 "$line"`