Ignore two more generated files

On Windows the name is "bin2char.exe".
All operating systems now have "xscale_handler.h".

.gitignore

@@ -7,8 +7,13 @@
 *.lo
 *.la
 *.in
+
 startup_tcl.c
+xscale_debug.h
+
 bin2char
+bin2char.exe
+
 doc/openocd.aux
 doc/openocd.cp
 doc/openocd.cps