The path in a .git platform independent link file needs to be absolute
and under mingw we need it to be a windows type path, not a unix style
path so it should start with a drive letter and not a /.
Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net> Signed-off-by: Stepan Kasal <kasal@ucw.cz> Signed-off-by: Junio C Hamano <gitster@pobox.com>