qtserialport-e: Various fixes per openembedded-devel list comments.

* Change DESCRIPTION to SUMMARY
 * Fix LICENSE declarations to be version-specific
 * Coding convention fixes * Don't modify Makefiles modified by qmake2; instead
   symlink qmake2 in to $WORKDIR to be run from there so that it uses
   $WORKDIR/qt.conf values

Signed-off-by: Wayne Warren <steven.w.warren@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>