ggml : fix buidling with Intel MKL but ask for "cblas.h" issue (#2104) (#2115)

* Fix buidling with Intel MKL but ask for "cblas.h" issue

* Use angle brackets to indicate the system library

ggml.c

@@ -247,7 +247,11 @@ inline static void* ggml_aligned_malloc(size_t size) {
 #include "ggml-opencl.h"
 #endif
 #elif defined(GGML_USE_OPENBLAS)
+#if defined(GGML_BLAS_USE_MKL)
+#include <mkl.h>
+#else
 #include <cblas.h>
+#endif
 #elif defined(GGML_USE_CUBLAS)
 #include "ggml-cuda.h"
 #elif defined(GGML_USE_CLBLAST)