Fill in phosphor-unit-failure-monitor main()

Obtain the command line arguments, construct the
monitor class, and have it analyze the failure.

Change-Id: I27015b7d485995ac7605f07622112f4b8d0aa621
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/fail-monitor/Makefile.am b/fail-monitor/Makefile.am
index 6c5c5b2..61fde80 100644
--- a/fail-monitor/Makefile.am
+++ b/fail-monitor/Makefile.am
@@ -5,6 +5,7 @@
 	phosphor-unit-failure-monitor
 
 phosphor_unit_failure_monitor_SOURCES = \
+	argument.cpp \
 	main.cpp \
 	monitor.cpp