fix: Fix missing deprecated symbols on windows with missing LLAMA_API prefix in header file

Author: abetlen

CMakeLists.txt

@@ -96,7 +96,15 @@ if (LLAMA_BUILD)
         set(GGML_METAL_EMBED_LIBRARY "ON" CACHE BOOL "ggml: embed metal library" FORCE)
     endif()
 
+
     add_subdirectory(vendor/llama.cpp)
+
+    if (WIN32)
+        if (TARGET llama)
+            set_target_properties(llama PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON)
+        endif()
+    endif()
+
     llama_cpp_python_install_target(llama)
     llama_cpp_python_install_target(ggml)