kernel-yocto.bbclass: ensure repatching when HEAD is checked out

In some cases it is seen that kernel_checkout and validate_branches are
run again in simultaneous builds. During do_patch the kgit-s2q mechanism
looks for a sentinel file inside the .git directory, finds a fence post
and starts picking up patches after that.

This can create trouble as validate_branches checks out the HEAD of the
branch and so the patches should be reapplied rather than skipped due to
finding of the fence post.

We can call kgit-s2q --clean to remove the sentinel file when the
branches are checked out.

(From OE-Core rev: d57aeafdd2b49010a9fa6d1cd9d10f3cfd5754a5)

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

meta/classes/kernel-yocto.bbclass

@@ -365,6 +365,10 @@ do_validate_branches() {
 			current_branch=`git rev-parse --abbrev-ref HEAD`
 			git branch "$current_branch-orig"
 			git reset --hard ${force_srcrev}
+			# We've checked out HEAD, make sure we cleanup kgit-s2q fence post check
+			# so the patches are applied as expected otherwise no patching
+			# would be done in some corner cases.
+			kgit-s2q --clean
 		fi
 	fi
 }

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=a6c2fa8aef1b
 
 DEPENDS = "git-native"
 
-SRCREV = "c14440d4e7ae0160c260ed65c3e123be5dc97ae8"
+SRCREV = "5deada879404820db146685729e89ba0887fc0ee"
 PR = "r12"
 PV = "0.2+git${SRCPV}"