linux-yocto: safely process unbranched repositories

The BSP bootstrap and -dev use cases can be applied against
unbranched or repos without meta data. To allow the proper
and safe processing of those repositories, slight modifications
to the tools are required to pass the branch on the command
line (rather than detecting it always) and to only checkout
branches that exist.

(From OE-Core rev: ae754be8b43677604a853ec6f62b2490a91d8836)

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/kernel-yocto.bbclass

@@ -25,7 +25,7 @@ do_patch() {
 			addon_features="$addon_features --feature $feat"
 		done
 	fi
-	updateme ${addon_features} ${ARCH} ${MACHINE} ${WORKDIR}
+	updateme --branch ${kbranch} ${addon_features} ${ARCH} ${MACHINE} ${WORKDIR}
 	if [ $? -ne 0 ]; then
 		echo "ERROR. Could not update ${kbranch}"
 		exit 1
@@ -87,9 +87,12 @@ do_kernel_configme() {
 	if [ -n "${YOCTO_KERNEL_EXTERNAL_BRANCH}" ]; then
            # switch from a generic to a specific branch
            kbranch=${YOCTO_KERNEL_EXTERNAL_BRANCH}
+           cd ${S}
+           git checkout ${kbranch}
+	else
+	   cd ${S}
 	fi
 
-	cd ${S}
 	configme --reconfig --output ${B} ${kbranch} ${MACHINE}
 	if [ $? -ne 0 ]; then
 		echo "ERROR. Could not configure ${KMACHINE}-${LINUX_KERNEL_TYPE}"

meta/recipes-kernel/kern-tools/kern-tools-native_git.bb

@@ -4,7 +4,7 @@ LIC_FILES_CHKSUM = "file://git/tools/kgit;beginline=5;endline=9;md5=e2bf4415f3d8
 
 DEPENDS = "git-native guilt-native"
 
-SRCREV = "92b965b02e3ac32badde3ee71a1e7d3a85cedeb8"
+SRCREV = "c5896a60acc61f8966cfee3bb241ff564610cea4"
 PR = r10
 PV = "0.1+git${SRCPV}"