Revert "Updated bgfx, bx and bimg to current upstream versions. (#11493)"

This reverts commit 1c61ccf.

Author: cuavas

3rdparty/bgfx/.github/workflows/main.yml

@@ -211,7 +211,10 @@ jobs:
       fail-fast: true
       matrix:
         include: [
+          { platform: arm    },
           { platform: arm64  },
+          { platform: x86    },
+          { platform: x86_64 },
         ]
     name: android-${{ matrix.platform }}
     runs-on: ubuntu-22.04