build: mllib: put $(LIBTINFO_LIBS) within '...'

This helps when $(LIBTINFO_LIBS) contains spaces (i.e. more than one
"word").
src: inspect: move read_package within the -Wno-cast-align block

Starting from commit e260460a8f608cb30093d7512b12f6ee11841456 be32toh is
used, which means possible "unaligned cast" warnings (already covered in
get_rpm_header_tag).