lib/oe/recipeutils: patch_recipe_lines: allow omitting trailing newlines

lib/oe/recipeutils: patch_recipe_lines: allow omitting trailing newlines

This function was assuming that what you wanted was that output lines
had trailing newline characters. If you're just outputting each line
verbatim to a text file then that's fine, but sometimes you start with
the assumption that the lines don't have trailing newlines; thus we
shouldn't allow for the possibility that the caller doesn't want them
and add a parameter to control it.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>