linux-yocto: allow configuration of arbitrary branches

When building an external tree or bootstrapping a BSP the
external branch may not have been checked out. The tools now ensure
that the tree is ready for configuration, so we no longer need to
force the checkout of the external branch.

This change is coupled with some kern tools tweaks as follows:

  40d9bab updateme: allow the location of board descriptions based on defines
  59859ca createme: use branch name when creating meta data
  91b4275 configme: determine meta branch based on directories, not branch naming
  f5a915c kgit-meta: make branch creation and renaming more robust

(From OE-Core rev: 02c82bf5255b09bb27a0a4509861a3d2bd84b09f)

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

meta/classes/kernel-yocto.bbclass

@@ -28,7 +28,8 @@ do_patch() {
 			addon_features="$addon_features --feature $feat"
 		done
 	fi
-	updateme --branch ${kbranch} ${addon_features} ${ARCH} ${KMACHINE} ${WORKDIR}
+	updateme --branch ${kbranch} -DKDESC=${KMACHINE}:${LINUX_KERNEL_TYPE} \
+                         ${addon_features} ${ARCH} ${KMACHINE} ${WORKDIR}
 	if [ $? -ne 0 ]; then
 		echo "ERROR. Could not update ${kbranch}"
 		exit 1
@@ -86,17 +87,8 @@ addtask kernel_checkout before do_patch after do_unpack
 do_kernel_configme() {
 	echo "[INFO] doing kernel configme"
 
-	kbranch=${KBRANCH}
-	if [ -n "${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
-
-	configme --reconfig --output ${B} ${kbranch} ${MACHINE}
+	cd ${S}
+	configme --reconfig --output ${B} ${KBRANCH} ${KMACHINE}
 	if [ $? -ne 0 ]; then
 		echo "ERROR. Could not configure ${KMACHINE}-${LINUX_KERNEL_TYPE}"
 		exit 1

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 = "f5a915c277a37ba5949b4c0778356189e7dd9ec0"
+SRCREV = "40d9bab24bde4c2f94a0cece153663aa93e0f9a4"
 PR = r10
 PV = "0.1+git${SRCPV}"