ci: work around a failing g++ compilation (order of methods in an interface dispatching table matters for C++ compilers)

vlib/rand/wyrand/wyrand.v

@@ -22,12 +22,6 @@ mut:
 	extra     u32
 }
 
-// free should be called when the generator is no longer needed
-[unsafe]
-pub fn (mut rng WyRandRNG) free() {
-	unsafe { free(rng) }
-}
-
 // seed sets the seed, needs only two `u32`s in little-endian format as [lower, higher].
 pub fn (mut rng WyRandRNG) seed(seed_data []u32) {
 	if seed_data.len != 2 {
@@ -256,3 +250,9 @@ pub fn (mut rng WyRandRNG) f64_in_range(min f64, max f64) f64 {
 	}
 	return min + rng.f64n(max - min)
 }
+
+// free should be called when the generator is no longer needed
+[unsafe]
+pub fn (mut rng WyRandRNG) free() {
+	unsafe { free(rng) }
+}