chore: vendor pinned offline simulation sources

vendor/lab-runtime/memops.c

@@ -0,0 +1,24 @@
+#include <stddef.h>
+
+void *memcpy(void *dst, const void *src, size_t n)
+{
+    unsigned char *d = dst;
+    const unsigned char *s = src;
+
+    for (size_t i = 0; i < n; ++i) {
+        d[i] = s[i];
+    }
+
+    return dst;
+}
+
+void *memset(void *dst, int c, size_t n)
+{
+    unsigned char *d = dst;
+
+    for (size_t i = 0; i < n; ++i) {
+        d[i] = (unsigned char)c;
+    }
+
+    return dst;
+}