serial-forward, pty-forward-native: remove extra slash and '.git' from SRC_URI
* causing multiple files and checkouts in downloads directory for same revision
4,3M downloads/git2/git.freesmartphone.org.cornucopia
4,3M downloads/git2/git.freesmartphone.org.cornucopia.git
4,3M downloads/git2/git.freesmartphone.org.cornucopia.git.
(From meta-openembedded rev:
506d990f7215217e6d36af4788cd5d08fb54332e)
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>