Add NEC V850 testbin (#55)

* Add sample v850 binary built with https://github.com/radare/ired/pull/4

* binaries/ folder as mentioned on the README is nowhere to be found in
this repo... also it is unclear what this Makefile is for:

$ make
make -C elf
make[1]: *** No targets specified and no makefile found.  Stop.
make: *** [all] Error 2

* README lines right for OCD folks :P

README

@@ -1,9 +1,9 @@
 README
 ======
 
-binaries/ contains sample binaries used for tests. To create reproducible tests on
-all platforms the binaries itself are stored in the repository. If it's
-necessary to recreate them, run `make clean; make`.
+To create reproducible tests on all platforms the binaries itself
+are stored in the repository. If it's necessary to recreate them,
+run `make clean; make`.
 
 Requirements
 ------------