targets/wasm_exec: add runtime.getRandomData to gojs imports

Author: pedramktb

targets/wasm_exec.js

@@ -294,6 +294,11 @@
 						return BigInt((timeOrigin + performance.now()) * 1e6);
 					},
 
+					// func getRandomData(buf []byte)
+					"runtime.getRandomData": (buf_ptr, buf_len) => {
+						crypto.getRandomValues(loadSlice(buf_ptr, buf_len));
+					},
+
 					// func sleepTicks(timeout int64)
 					"runtime.sleepTicks": (timeout) => {
 						// Do not sleep, only reactivate scheduler after the given timeout.