parse.c:

parse.c:
  Don't clear MOD_EXPLICITLY_SIGNED in indirect.\
symbol.c:
  Add modifier MOD_EXPLICITLY_SIGNED to all versions of "signed".
  check for integer bitfields that are just "int foo : 42".
symbol.h:
  Define MOD_EXPLICITLY_SIGNED.
  This will be used to distinguish "int" and "signed int".
show-parse.c:
  Show MOD_EXPLICITLY_SIGNED as "[explicitly-signed]".