xtensa-build-zephyr.py: checksum autoconf.h instead of configs.c

autoconf.h has strings, configs.c has not.

We can do this now since this $BOARD_REVISION fix:

zephyrproject-rtos/zephyr@811a74c0199f

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

scripts/xtensa-build-zephyr.py

@@ -961,7 +961,7 @@ class InstFile:
  installed_files = [
  # Fail if one of these is missing
  InstFile(".config", "config", txt=True),
- InstFile("misc/generated/configs.c", "generated_configs.c", txt=True),
+ InstFile("include/generated/autoconf.h", "generated_autoconf.h", txt=True),
  InstFile("include/generated/version.h", "zephyr_version.h",
  gzip=False, txt=True),
  InstFile("include/generated/sof_versions.h", "sof_versions.h",
@@ -1042,7 +1042,7 @@ class InstFile:
  'dsp_basefw.bin',
 
  '*version*.h',
- '*configs.c', # deterministic unlike .config
+ '*autoconf.h', # .config has absolute paths in comments, this has not.
  '*.toml', # rimage
  '*.strip', '*stripped*', # stripped ELF files are reproducible
  'boot.mod', # no debug section -> no need to strip this ELF