loader: Add back func calls

Previously removed function calls in extension_create_instance
because I believed they were no longer needed.  I was incorrect.

Change-Id: Ibc63009f0038a413b7e1bc03225818b046a62352
diff --git a/loader/extensions.c b/loader/extensions.c
index fd7e0ec..5a0608a 100644
--- a/loader/extensions.c
+++ b/loader/extensions.c
@@ -130,6 +130,29 @@
         return true;
     }
 
+    // Functions for the VK_AMD_draw_indirect_count extension
+
+    if (!strcmp("vkCmdDrawIndirectCountAMD", name)) {
+        *addr = (void *)vkCmdDrawIndirectCountAMD;
+        return true;
+    }
+
+    if (!strcmp("vkCmdDrawIndexedIndirectCountAMD", name)) {
+        *addr = (void *)vkCmdDrawIndexedIndirectCountAMD;
+        return true;
+    }
+
+#ifdef VK_USE_PLATFORM_WIN32_KHR
+
+    // Functions for the VK_NV_external_memory_win32 extension
+
+    if (!strcmp("vkGetMemoryWin32HandleNV", name)) {
+        *addr = (void *)vkGetMemoryWin32HandleNV;
+        return true;
+    }
+
+#endif // VK_USE_PLATFORM_WIN32_KHR
+
     return false;
 }