scripts/fuzz.sh: add a couple debug -DCONFIG_ options

They shouldn't do much but they can't hurt.

See thesofproject#8632 for more details.

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

scripts/fuzz.sh

@@ -107,6 +107,8 @@ main()
   local fuzz_configs=(
     -DCONFIG_ZEPHYR_POSIX=y
     -DCONFIG_ASSERT=y
+    -DCONFIG_EXCEPTION_DEBUG=y
+    -DCONFIG_ARCH_POSIX_TRAP_ON_FATAL=y
     -DCONFIG_SYS_HEAP_BIG_ONLY=y
     -DCONFIG_ZEPHYR_NATIVE_DRIVERS=y
     -DCONFIG_ARCH_POSIX_LIBFUZZER=y