Bump randombytes repository

Makefile

@@ -1,5 +1,8 @@
-CFLAGS += -m64 -std=c99 -pedantic -Wall -Wshadow -Wpointer-arith -Wcast-qual \
-          -Wstrict-prototypes -Wmissing-prototypes -g -O2
+CFLAGS += -g -O2 -m64 -std=c99 -pedantic \
+	-Wall -Wshadow -Wpointer-arith -Wcast-qual -Wformat -Wformat-security \
+	-Werror=format-security -Wstrict-prototypes -Wmissing-prototypes \
+	-D_FORTIFY_SOURCE=2 -fstack-protector-strong --param ssp-buffer-size=4 \
+	-fPIC -fno-strict-overflow
 SRCS = hazmat.c randombytes.c sss.c tweetnacl.c
 OBJS := ${SRCS:.c=.o}