scripts: setlocalversion: remove quotes around localversion from config

After replacing of include/config/auto.conf sourcing with
extraction of CONFIG_LOCALVERSION, resulting version string
contains quotes around localversion part which are always
present in auto.conf (even if localversion is empty).

This patch fixes this script to remove quotes.

Signed-off-by: Nikita Maslov <wkernelteam@gmail.com>
Cc: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

scripts/setlocalversion

@@ -153,8 +153,9 @@ if test -e include/config/auto.conf; then
 	# We are interested only in CONFIG_LOCALVERSION and
 	# CONFIG_LOCALVERSION_AUTO, so extract these in a safe
 	# way (i.e. w/o sourcing auto.conf)
-	CONFIG_LOCALVERSION=`cat include/config/auto.conf | awk -F '=' '/^CONFIG_LOCALVERSION=/ {print $2}'`
-	CONFIG_LOCALVERSION_AUTO=`cat include/config/auto.conf | awk -F '=' '/^CONFIG_LOCALVERSION_AUTO=/ {print $2}'`
+	# xargs echo removes quotes
+	CONFIG_LOCALVERSION=`cat include/config/auto.conf | awk -F '=' '/^CONFIG_LOCALVERSION=/ {print $2}' | xargs echo`
+	CONFIG_LOCALVERSION_AUTO=`cat include/config/auto.conf | awk -F '=' '/^CONFIG_LOCALVERSION_AUTO=/ {print $2}' | xargs echo`
 else
 	echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
 	exit 1