[spinel] abort host after receiving unexpected reset from RCP (#8909)

Some platforms, such as Android and CastOS, can monitor program crash.
And they can upload the crash dump to the crash server for developers
to analyze the crash reason.

This commit aborts the host after receiving a unexpected reset to
trigger platforms to upload the crash dump.

src/lib/spinel/openthread-spinel-config.h

@@ -55,4 +55,13 @@
 #define OPENTHREAD_SPINEL_CONFIG_RCP_RESTORATION_MAX_COUNT 0
 #endif
 
+/**
+ * @def OPENTHREAD_SPINEL_CONFIG_ABORT_ON_UNEXPECTED_RCP_RESET_ENABLE
+ *
+ * Define 1 to abort the host when receiving unexpected reset from RCP.
+ *
+ */
+#ifndef OPENTHREAD_SPINEL_CONFIG_ABORT_ON_UNEXPECTED_RCP_RESET_ENABLE
+#define OPENTHREAD_SPINEL_CONFIG_ABORT_ON_UNEXPECTED_RCP_RESET_ENABLE 0
+#endif
 #endif // OPENTHREAD_SPINEL_CONFIG_H_

src/lib/spinel/radio_spinel_impl.hpp

@@ -2259,6 +2259,8 @@ void RadioSpinel<InterfaceType, ProcessContextType>::HandleRcpUnexpectedReset(sp
 
 #if OPENTHREAD_SPINEL_CONFIG_RCP_RESTORATION_MAX_COUNT > 0
     mRcpFailed = true;
+#elif OPENTHREAD_SPINEL_CONFIG_ABORT_ON_UNEXPECTED_RCP_RESET_ENABLE
+    abort();
 #else
     DieNow(OT_EXIT_RADIO_SPINEL_RESET);
 #endif