.gitignore: add misc/nasmtok.el, make whole rdoff directory ignored

misc/nasmtok.el is a generated file.
The whole rdoff directory is obsolete; if someone still has it it can
be ignored.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Author: H. Peter Anvin

.gitignore

@@ -75,22 +75,14 @@ TAGS
 /doc/Fontmap
 /include/warnings.h
 /macros/macros.c
+/misc/nasmtok.el
 /misc/omfdump
 /nasm
 /ndisasm
 /nasm.spec
 /nsis/arch.nsh
 /nsis/version.nsh
-/rdoff/Makefile
-/rdoff/ldrdf
-/rdoff/rdf2bin
-/rdoff/rdf2com
-/rdoff/rdf2ihx
-/rdoff/rdf2ith
-/rdoff/rdf2srec
-/rdoff/rdfdump
-/rdoff/rdflib
-/rdoff/rdx
+/rdoff
 /test/golden
 /test/perf/*.asm
 /test/testresults