msl: Add a max31785 MSL checking script

Add a script that checks the firmware revision of a max31785 hwmon
device and populates the MeetsMinimumShipLevel interface of the
specified inventory items.

Change-Id: If3dd527d2815edffd3b8b425a15617290016769b
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/Makefile.am b/Makefile.am
index 1ac9033..359db2e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -24,4 +24,4 @@
 	env.cpp \
 	fan_speed.cpp
 
-SUBDIRS = . test
+SUBDIRS = . test msl