* debugger/mcs51/acinclude.m4, debugger/mcs51/aclocal.m4,

* debugger/mcs51/acinclude.m4, debugger/mcs51/aclocal.m4,
  debugger/mcs51/configure: fixed failed check because the function
  rl_function_of_keyseq isn't in Readline 5.2. Thanks to Ilya Goldberg
  who submitted the patch for gpsim.
* debugger/mcs51/configure.in: removed the result message
* debugger/mcs51/Makefile.in: fixed the config.status warning
  "... seems to ignore the --datarootdir setting"

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@4467 4a8a32a2-be11-0410-ad9d-d568d2c75423