added a simple program to do quantization for clip models

examples/llava/quantclip.cpp

@@ -0,0 +1,30 @@
+#include "ggml.h"
+#include "common.h"
+#include "clip.h"
+#include "llava.h"
+#include "llama.h"
+
+#include "base64.hpp"
+
+#include <cstdio>
+#include <cstdlib>
+#include <vector>
+
+
+int main(int argc, char ** argv) {
+    ggml_time_init();
+
+     if (argc != 3) {
+        fprintf(stderr, "usage: %s mmproj-f16.gguf output-mmproj-quantized.gguf\n", argv[0]);
+        return 1;
+    }
+
+    const std::string fname_inp = argv[1];
+    const std::string fname_out = argv[2];
+
+    printf("quantizing mmproj clip model to q4_1... ");
+    clip_model_quantize(fname_inp.c_str(), fname_out.c_str(), GGML_TYPE_Q4_1);
+    printf("done\n");
+
+    return 0;
+}