Unify struct names and tags

src/uuid/uuid.c

@@ -9,8 +9,8 @@
 
 #define UUID_STR_FORMAT ("%.8" PRIx64 "-%.4" PRIx64 "-%.4" PRIx64 "-%.4" PRIx64 "-%.12" PRIx64)
 
-typedef struct uuid4 UUID4;
-struct uuid4 {
+typedef struct UUID4 UUID4;
+struct UUID4 {
 	u64 high;
 	u64 low;
 };