CONFIGURE: Disable use of USE_ARM_SOUND_ASM.

The feature is currently broken (see bug #6957 "AUDIO: ARM ASM sound code causes distorted audio on 32 bit armv6").
Fixing the feature looks highly non-trivial and since nobody volunteered so
far it's unlikely we will see any fix soon.

configure

@@ -2048,7 +2048,12 @@ case $_host_cpu in
 	arm*)
 		echo "ARM"
 		define_in_config_if_yes yes 'USE_ARM_SCALER_ASM'
-		define_in_config_if_yes yes 'USE_ARM_SOUND_ASM'
+		# FIXME: The following feature exhibits a bug. It produces distorted
+		# sound since 9003ce517ff9906b0288f9f7c02197fd091d4554. The ARM
+		# assembly will need to be properly adapted to the changes to the C
+		# code in 8f5a7cde2f99de9fef849b0ff688906f05f4643e.
+		# See bug #6957: "AUDIO: ARM ASM sound code causes distorted audio on 32 bit armv6"
+		#define_in_config_if_yes yes 'USE_ARM_SOUND_ASM'
 		define_in_config_if_yes yes 'USE_ARM_SMUSH_ASM'
 		define_in_config_if_yes yes 'USE_ARM_GFX_ASM'
 		# FIXME: The following feature exhibits a bug during the intro scene of Indy 4