image_types_wic.bbclass: alphabetize list of WICVARS

It's way easier to scan a list of variables if they're sorted one per
line.

(From OE-Core rev: aec6fcb98c7dabf16779efb333be09d73d9f4ee0)

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/image_types_wic.bbclass

@@ -1,11 +1,35 @@
 # The WICVARS variable is used to define list of bitbake variables used in wic code
 # variables from this list is written to <image>.env file
 WICVARS ?= "\
-           BBLAYERS IMGDEPLOYDIR DEPLOY_DIR_IMAGE FAKEROOTCMD IMAGE_BASENAME IMAGE_EFI_BOOT_FILES IMAGE_BOOT_FILES \
+	APPEND \
-           IMAGE_LINK_NAME IMAGE_ROOTFS INITRAMFS_FSTYPES INITRD INITRD_LIVE ISODIR RECIPE_SYSROOT_NATIVE \
+	ASSUME_PROVIDED \
-           ROOTFS_SIZE STAGING_DATADIR STAGING_DIR STAGING_LIBDIR TARGET_SYS HOSTTOOLS_DIR \
+	BBLAYERS \
-           KERNEL_IMAGETYPE MACHINE INITRAMFS_IMAGE INITRAMFS_IMAGE_BUNDLE INITRAMFS_LINK_NAME APPEND \
+	DEPLOY_DIR_IMAGE \
-           ASSUME_PROVIDED PSEUDO_IGNORE_PATHS"
+	FAKEROOTCMD \
+	HOSTTOOLS_DIR \
+	IMAGE_BASENAME \
+	IMAGE_BOOT_FILES \
+	IMAGE_EFI_BOOT_FILES \
+	IMAGE_LINK_NAME \
+	IMAGE_ROOTFS \
+	IMGDEPLOYDIR \
+	INITRAMFS_FSTYPES \
+	INITRAMFS_IMAGE \
+	INITRAMFS_IMAGE_BUNDLE \
+	INITRAMFS_LINK_NAME \
+	INITRD \
+	INITRD_LIVE \
+	ISODIR \
+	KERNEL_IMAGETYPE \
+	MACHINE \
+	PSEUDO_IGNORE_PATHS \
+	RECIPE_SYSROOT_NATIVE \
+	ROOTFS_SIZE \
+	STAGING_DATADIR \
+	STAGING_DIR \
+	STAGING_LIBDIR \
+	TARGET_SYS \
+"
 
 inherit ${@bb.utils.contains('INITRAMFS_IMAGE_BUNDLE', '1', 'kernel-artifact-names', '', d)}