Fix switch to wrong mode in AbortFindHandler
ROOL authored
Detail:
  Was (trying to) clear the M32 flag in {CONFIG}=32.
  Ref: https://www.riscosopen.org/forum/forums/1/topics/15080?page=1#posts-99441
  Makefile updated to only pass rlib's txt switch when building rlib.

Version 6.05. Tagged as 'RISC_OSLib-6_05'
ae6fe48b