Add some comments explaining what this script does, fix one grammatical
error in a comment and make the tar-replacement-native comment give the
full reason why it is needed.
(From OE-Core rev: aa946e1d054d3a0b7097339e0fb74ee60bd94a78)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>