[ci] Explicitly disable vulkan_use_x11

Author: swift-kim

.github/workflows/build.yml

@@ -53,6 +53,9 @@ jobs:
       - name: Generate sysroot
         run: src/flutter/ci/tizen/generate_sysroot.py --out /tizen_tools/sysroot
 
+      - name: Disable vulkan_use_x11
+        run: sed -i 's/vulkan_use_x11 = true/vulkan_use_x11 = false/g' src/build_overrides/vulkan_headers.gni
+
       - name: Build
         run: |
           src/flutter/tools/gn \