Fix crash when using gdb>v10.0 (Thank to Graeme).

Author: fredvs

src/msegdbutils.pas

@@ -991,7 +991,7 @@ procedure tgdbmi.startgdb(commandline: msestring);
  haslang:= sys_getenv(lcmessages,langbefore);
  sys_setenv(lcmessages,'C');
 
- fgdb:= execmse2(syscommandline(commandline)+' --interpreter=mi --nx --readnever ',
+ fgdb:= execmse2({$ifdef UNIX}'DEBUGINFOD_URLS=; ' + {$endif} syscommandline(commandline)+' --interpreter=mi --nx --readnever',
                 fgdbto,fgdbfrom,fgdbfrom,-1,
                 [exo_inactive,exo_tty,exo_winpipewritehandles]);