ci: build examples with c++ compiler (#8261)

examples/assets/emoji/img_emoji_F617.c

@@ -239,16 +239,18 @@ const LV_ATTRIBUTE_MEM_ALIGN LV_ATTRIBUTE_IMAGE_1F617 uint8_t emoji_F617_map[] =
 };
 
 const lv_image_dsc_t emoji_F617 = {
-    .header.cf = LV_COLOR_FORMAT_NATIVE,
-    .header.w = 72,
-    .header.h = 72,
+    .header = {
+        .cf = LV_COLOR_FORMAT_NATIVE,
+        .w = 72,
+        .h = 72,
 #if LV_COLOR_DEPTH == 1 || LV_COLOR_DEPTH == 8
-    .header.stride = 72,
+        .stride = 72,
 #elif LV_COLOR_DEPTH == 16
-    .header.stride = 144,
+        .stride = 144,
 #elif LV_COLOR_DEPTH == 32
-    .header.stride = 288,
+        .stride = 288,
 #endif
-    .data = emoji_F617_map,
+    },
     .data_size = sizeof(emoji_F617_map),
+    .data = emoji_F617_map,
 };