example-config: update OPENXT_GIT_MIRROR syntax and add OPENXT_GIT_PROTOCOL

Remove leading git:// from OPENXT_GIT_MIRROR and create new variable
OPENXT_GIT_PROTOCOL to populate the protocol= field used by the bitbake
fetcher.

OXT-10
do_build.sh: set OPENXT_GIT_PROTOCOL and OPENXT_BRANCH in local.conf

OPENXT_BRANCH is used for branch= flag for bitbake's git fetcher.
This was renamed from previously unused XENCLIENT_BRANCH.

OPENXT_GIT_PROTOCOL is used for protocol= flag.

OXT-10
do_build.sh: incorporate OPENXT_GIT_PROTOCOL where necessary for git URLs.

OXT-10
do_build.sh: fixup do_oe_syncui_copy() to handle OE version changes.

Reported-by: Brendan Kerrigan <kerriganb@ainfosec.com>

OXT-10
Merge pull request #36 from cjp256/oxt-10-v2

[OXT-10] v2
xen: uprev to xen 4.3.3

Note that if you have an existing build tree, you will need to make
comparable changes to your local.conf.

OXT-20

Signed-off-by: Chris Patterson <pattersonc@ainfosec.com>
OXT-25 : Move setup_build from xenclient-oe.git to openxt.git.

Fixup paths in do_build.sh. Add setup_build script with minor edit
to allow it to be run from the build scripts dir.
do_build.sh: export OPENXT_GIT_PROTOCOL for xctools

Add export of OPENXT_GIT_PROTOCOL for xctools build scripts

OXT-46
pkg-xc{tools,switcher}/build: Add OPENXT_GIT_PROTOCOL

Add OPENXT_GIT_PROTOCOL to git URIs in xctools build scripts.

OXT-46
Merge pull request #41 from bennettj1087/oxt-46

[OXT-46] openxt: Add missing protocol string to git URIs in xctools build scripts
Merge pull request #39 from cjp256/oxt-20-v3

[OXT-20] xen: uprev to xen 4.3.3
Merge pull request #40 from flihp/master

OXT-25 : Move setup_build from xenclient-oe.git to openxt.git.