Factor benchmarks out into tests\benchmark\<pkg>

tests/benchmark/Makefile

@@ -0,0 +1,14 @@
+ODIN=../../odin
+COMMON=-no-bounds-check -vet -strict-style
+
+all: crypto_bench \
+     hash_bench
+
+crypto_bench:
+	$(ODIN) test crypto $(COMMON) -o:speed -out:bench_crypto
+
+hash_bench:
+	$(ODIN) test hash $(COMMON) -o:speed -out:bench_hash
+
+clean:
+	rm bench_*