kernel.bbclass: touch .scmversion also in ${S}

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/classes/kernel.bbclass

@@ -212,7 +212,7 @@ kernel_do_configure() {
 	# $ scripts/setlocalversion . => +
 	# $ make kernelversion => 2.6.37
 	# $ make kernelrelease => 2.6.37+
-	touch ${B}/.scmversion
+	touch ${B}/.scmversion ${S}/.scmversion
 
 	# Copy defconfig to .config if .config does not exist. This allows
 	# recipes to manage the .config themselves in do_configure_prepend().