Build a Wasm test platform in test_gen

compiler/test_gen/src/helpers/wasm_test_platform.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+
+void *roc_alloc(size_t size, unsigned int alignment) { return malloc(size); }
+
+void *roc_realloc(void *ptr, size_t new_size, size_t old_size,
+                  unsigned int alignment)
+{
+    return realloc(ptr, new_size);
+}
+
+void roc_dealloc(void *ptr, unsigned int alignment) { free(ptr); }
+
+void roc_panic(void *ptr, unsigned int alignment)
+{
+    char *msg = (char *)ptr;
+    fprintf(stderr,
+            "Application crashed with message\n\n    %s\n\nShutting down\n", msg);
+    exit(0);
+}
+
+void *roc_memcpy(void *dest, const void *src, size_t n)
+{
+    return memcpy(dest, src, n);
+}
+
+void *roc_memset(void *str, int c, size_t n) { return memset(str, c, n); }