* as/mcs51/aslink.h: completed lkrloc.c prototypes

* as/mcs51/aslink.h: completed lkrloc.c prototypes
* as/mcs51/lkmain.c (link_main): fixed warning
* device/include/stdbool.h: ds390 has no advanced bit support yet
* src/SDCC.y: use SPEC_SHORT and renamed _signed to b_signed
* src/SDCCsymt.c: use SPEC_SHORT and renamed _signed to b_signed
* src/SDCCsymt.h (struct specifier): renamed _xxx bitfields to b_xxx
  and updated their macros
* src/SDCCval.c (constVal): updated comment for renamed b_long

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@3874 4a8a32a2-be11-0410-ad9d-d568d2c75423