devSpec:lex: Fix devSpecType keywords

We can't use a plain single letter anymore, so now let's
use some longer keywords instead. New keywords are:
* +idev: interoceptors.
* +adev: actuators.
* +edev: extrospectors.

hcore/deviceManager/deviceSpecl.ll

@@ -6,16 +6,16 @@
 %}
 
 %%
-^a              {
-                    deviceSpecplval.chr = yytext[0];
+"+adev"        {
+                    deviceSpecplval.chr = yytext[1];
                     return KEYWORD_SPECTYPE_ACTUATOR;
                 }
-^e              {
-                    deviceSpecplval.chr = yytext[0];
+"+edev"         {
+                    deviceSpecplval.chr = yytext[1];
                     return KEYWORD_SPECTYPE_EXTROSPECTOR;
                 }
-^i              {
-                    deviceSpecplval.chr = yytext[0];
+"+idev"         {
+                    deviceSpecplval.chr = yytext[1];
                     return KEYWORD_SPECTYPE_INTEROSPECTOR;
                 }
 "||"            { return DOUBLE_PIPE; }