revise timeout b/c macOS doesn't support the command, nice

Author: jglogan

Makefile

@@ -156,7 +156,16 @@ install-kernel:
 		MONITOR_PID=$$!; \
 		echo "Monitor running with PID $$MONITOR_PID"; \
 	fi; \
-	timeout 60 bin/container --debug system start --timeout 60 --enable-kernel-install $(SYSTEM_START_OPTS)
+	bin/container --debug system start --timeout 60 --enable-kernel-install $(SYSTEM_START_OPTS) & \
+	CMD_PID=$$!; \
+	TIMEOUT=120; \
+	( sleep $$TIMEOUT && kill -TERM $$CMD_PID 2>/dev/null && echo "Command timed out after $$TIMEOUT seconds" ) & \
+	KILLER_PID=$$!; \
+	wait $$CMD_PID; \
+	STATUS=$$?; \
+	kill -TERM $$KILLER_PID 2>/dev/null; \
+	wait $$KILLER_PID 2>/dev/null; \
+	exit $$STATUS
 
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 coverage: init-block