create debian branch only for make debian package.

[master] branch is for the source code develop
[debian] branch is for keep debian package code.

becuase other system like gentoo arch doesn't need the "debian/" folder.

Signed-off-by: Xiangfu Liu <xiangfu@openmobilefree.net>
Acked-by: Li Danbing <lidaobing@gmail.com>

debian/rules

@@ -1,63 +0,0 @@
-#!/usr/bin/make -f
-# This file is in the public domain.
-# You may freely use, modify, distribute, and relicense it.
-
-build clean install binary-arch binary-indep binary:
-	+dh --parallel $(opt_no_act) $@
-
-override_dh_auto_clean:
-	test -e debian/xburst_stage1.bin || { \
-		echo >&2 see debian/README.source; \
-		exit 1; \
-	}
-	dh_auto_clean
-	sh debian/clean.sh
-
-override_dh_auto_configure: configure
-	dh_auto_configure -- $(opt_optimize) $(opt_quiet) \
-		--disable-firmware  LDFLAGS=-Wl,-z,defs
-
-override_dh_auto_install:
-	dh_auto_install
-	: install firmware from source package
-	dh_install debian/xburst_stage1.bin usr/share/xburst-tools/
-	dh_install debian/xburst_stage2.bin usr/share/xburst-tools/
-	dh_install debian/stage1.bin usr/share/xburst-tools/
-
-override_dh_installchangelogs:
-	dh_installchangelogs debian/changelog.upstream
-
-opt_optimize = CFLAGS="-g -O2"
-opt_no_act =
-opt_quiet =
-
-ifneq (,$(filter noopt,$(DEB_BUILD_OPTIONS)))
-    opt_optimize = CFLAGS="-g -O0"
-endif
-
-ifneq (,$(findstring n,$(MAKEFLAGS)))
-    opt_no_act = --no-act
-endif
-
-ifneq (,$(filter quiet,$(DEB_BUILD_OPTIONS)))
-    opt_quiet = --quiet
-    MAKEFLAGS += --quiet
-endif
-
-configure: configure.ac
-	AUTOMAKE="automake --foreign" autoreconf -is
-
-firmware: configure
-	./configure --enable-firmware
-	$(MAKE) -C usbboot/src \
-		../xburst_stage1/xburst_stage1.bin \
-		../xburst_stage2/xburst_stage2.bin
-	$(MAKE) -C xbboot/host-app \
-		../target-stage1/stage1.bin
-
-REPO = git://projects.qi-hardware.com/xburst-tools.git
-BRANCH = master
-debiandir_SQ = $(subst ','\'',$(dir $(lastword $(MAKEFILE_LIST))))
-get-orig-source:
-	REPO='$(REPO)' BRANCH='$(BRANCH)' \
-		sh '$(debiandir_SQ)'get-orig-source.sh