image_types: declare support for wic.zst

Declare images in wic.zst format as supported, as bmaptool now supports
zstd:
https://github.com/intel/bmap-tools/commit/1b8437d58447d3796dc11fd0f2c62bec5746e5d6
Given the very fast decompression speed of zstd over, for example, gzip,
writing images with bmaptool can provide big write speed improvements
when decompression speed is the limiting factor (especially with very
sparse images).

(From OE-Core rev: 704b01f33196cfdeaa57e2f2602ff2d52b25ab93)

Signed-off-by: Diego Rondini <diego.rondini@kynetics.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/image_types.bbclass

@@ -273,7 +273,7 @@ IMAGE_TYPES = " \
     ubi ubifs multiubi \
     tar tar.gz tar.bz2 tar.xz tar.lz4 tar.zst \
     cpio cpio.gz cpio.xz cpio.lzma cpio.lz4 \
-    wic wic.gz wic.bz2 wic.lzma \
+    wic wic.gz wic.bz2 wic.lzma wic.zst \
     container \
     f2fs \
 "

meta/lib/oeqa/selftest/cases/imagefeatures.py

@@ -209,7 +209,7 @@ class ImageFeatures(OESelftestTestCase):
         image_name = 'core-image-minimal'
 
         all_image_types = set(get_bb_var("IMAGE_TYPES", image_name).split())
-        blacklist = set(('container', 'elf', 'f2fs', 'multiubi', 'tar.zst'))
+        blacklist = set(('container', 'elf', 'f2fs', 'multiubi', 'tar.zst', 'wic.zst'))
         img_types = all_image_types - blacklist
 
         config = 'IMAGE_FSTYPES += "%s"\n'\