ems v3.43, mc4plus v3.37, mc2plus v3.27 (#35)

also added the related .map files which tell mapping of assembly instructions
and functions into the code space. these files can be used to locate the hex
adddresses contained in the diagnostics

- built:
  - ems v3.43, build 15 sept 2021 @ 14:37
  - mc4plus v3.37, build 15 sept 2021 @ 14:44
  - mc2plus v3.27, build 15 sept 2021 @ 14:46
- main changes from previous release are:
  - the fatal error handler whch forces the the restart sends diagnostics w/ complete mpu stack
    and registers info to yarprobotinterface (see robotology/icub-firmware#201).
	these diagnostics are to be decoded w/ relevant .map files.

info/firmware.info.xml

@@ -25,22 +25,22 @@
     <board type="ems4">
         <firmware>
             <file>../ETH/EMS/bin/application/ems.hex</file>  
-            <version major='3' minor='42'/>
+            <version major='3' minor='43'/>
         </firmware>
     </board>
 
     <board type="mc4plus">
         <firmware>
             <file>../ETH/MC4PLUS/bin/application/mc4plus.hex</file>  
-            <version major='3' minor='36'/>
+            <version major='3' minor='37'/>
         </firmware>
     </board>
 
 
     <board type="mc2plus">
         <firmware>
             <file>../ETH/MC2PLUS/bin/application/mc2plus.hex</file>  
-            <version major='3' minor='26'/>
+            <version major='3' minor='27'/>
         </firmware>
     </board>