update NEWS for 2.8.0

Signed-off-by: Carl Zhang <[email protected]>

Author: XinfengZhang

NEWS

@@ -1,6 +1,10 @@
-libva-utils NEWS -- summary of changes.  2020-04-01
+libva-utils NEWS -- summary of changes.  2020-06-26
 Copyright (C) 2009-2020 Intel Corporation
 
+Version 2.8.0 - 26.Jun.2020
+* test: cast VA_STATUS_ERROR_UNKNOWN to VAStatus type
+* test/fixture: fix GCC 10.0.1 error with drmDevicePaths
+
 Version 2.7.0 - 1.Apr.2020
 * meson: add missing samples
 * sfcsample: drop unused Linux-only header