* src/SDCCasm.[ch]: renamed from asm[ch], use dbuf_getline(), ...

* src/SDCCasm.[ch]: renamed from asm[ch], use dbuf_getline(), ...
* src/src.dsp, src/Makefile.bcc, src/Makefile.in, src/common.h,
  src/SDCCglue.c, src/xa51/main.c: asm.[ch] renamed to SDCCasm.[ch]
* support/Util/dbuf_string.[ch]: added function dbuf_getline()
* src/ds390/gen.c, src/hc08/gen.c, src/mcs51/gen.c, src/pic16/gen.c,
  src/pic/gen.c, src/z80/gen.c, src/xa51/gen.c, src/pic16/ralloc.c,
  src/pic16/pcode.[ch]: added const qualifier

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@4985 4a8a32a2-be11-0410-ad9d-d568d2c75423