wasm: support more vendor libraries

Adds support for:
- box2d
- cgltf
- stb image
- stb rect pack

vendor/libc/include/assert.h

@@ -0,0 +1,16 @@
+#ifdef NDEBUG
+#define	assert(e)	((void)0)
+#else
+
+#ifdef __FILE_NAME__
+#define __ASSERT_FILE_NAME __FILE_NAME__
+#else /* __FILE_NAME__ */
+#define __ASSERT_FILE_NAME __FILE__
+#endif /* __FILE_NAME__ */
+
+void __odin_libc_assert_fail(const char *, const char *, int, const char *);
+
+#define	assert(e) \
+    (__builtin_expect(!(e), 0) ? __odin_libc_assert_fail(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
+
+#endif /* NDEBUG */