GNU Radio EXPAND macros for template files:
+ move the 3 EXPAND macros to a common place (GrMiscUtils);
+ use them, or remove the unnecessary code when not actually using;
+ modify EXPAND macros to do the expansion at configure time, build time, and any time a dependency has been modified.
docs: fixed doxygen since fec_generated_includes no longer exists.
Merge branch 'master' into next