build-deb target: Create man dirs with execute permissions

utils/build-deb.sh

@@ -24,8 +24,8 @@ mkdir -p "$SCRIPT_DEST_DIR"
 
 # Coping the files inside the build folder:
 install -D -T -b -m "$EXEC_PEM" -T "git-secret" "${SCRIPT_DEST_DIR}/usr/bin/git-secret"
-install -m "$READ_PEM" -d "${SCRIPT_DEST_DIR}/usr/share/man/man1"
-install -m "$READ_PEM" -d "${SCRIPT_DEST_DIR}/usr/share/man/man7"
+install -m "$EXEC_PEM" -d "${SCRIPT_DEST_DIR}/usr/share/man/man1"
+install -m "$EXEC_PEM" -d "${SCRIPT_DEST_DIR}/usr/share/man/man7"
 for file in man/man1/* ; do
  if [[ "$file" == *.ronn ]]; then
    continue