Switch to an internal implementation of uuid generation, so we can use the randomness pool.

adsbus/Makefile

@@ -1,11 +1,11 @@
 CC ?= clang
 CFLAGS ?= -Wall -Werror -O4 -g --std=gnu11 --pedantic-errors -fPIE -pie -fstack-protector-strong
 LDFLAGS ?= $(CFLAGS) -Wl,-z,relro -Wl,-z,now
-LIBS ?= -luuid -ljansson
+LIBS ?= -ljansson
 
 OBJ_NETWORK = receive.o send.o incoming.o outgoing.o
 OBJ_PROTOCOL = airspy_adsb.o beast.o json.o raw.o stats.o
-OBJ_UTIL = rand.o wakeup.o opts.o common.o
+OBJ_UTIL = rand.o uuid.o wakeup.o opts.o common.o
 
 all: adsbus