xtensa-build-zephyr.py: checksum dsp_basefw.bin

When using --fw-naming AVS the .ri file is renamed to `dsp_basefw.bin`.

Also explain why it's still useful to identify non-deterministic images.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>

Author: marc-hb

scripts/xtensa-build-zephyr.py

@@ -825,7 +825,12 @@ class InstFile:
 BIN_NAME = 'zephyr'
 
 CHECKSUM_WANTED = [
-	'*.ri',     # Some .ri files have a non-deterministic signature, others not
+	# Some .ri files have a deterministic signature, others use
+	# a cryptographic salt. Even for the latter a checksum is still
+	# useful to match an artefact with a specific build log.
+	'*.ri',
+	'dsp_basefw.bin',
+
 	'*version*.h',
 	'*configs.c', # deterministic unlike .config
 	'*.strip', '*stripped*', # stripped ELF files are reproducible