QPID-4181 r/6302: minimum changes for mingw.  still need to move posix/driver.c

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1434577 13f79535-47bb-0310-9956-ffa450edef68
QPID-4181 part2: move driver.c to posix/driver.c

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1434587 13f79535-47bb-0310-9956-ffa450edef68
QPID-4181: include driver_extras in perl and ruby swig files

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1434712 13f79535-47bb-0310-9956-ffa450edef68