Fix building of GtkCodeGen in Linux and macOS CI workflows

Author: stackotter

.github/workflows/swift-linux.yml

@@ -17,6 +17,7 @@ jobs:
         sudo apt install -y libgtk-4-dev clang
     - name: Build
       run: |
+        swift build --target GtkCodeGen && \
         cd Examples && \
         swift build --target SwiftCrossUI && \
         swift build --target GtkBackend && \
@@ -27,7 +28,6 @@ jobs:
         swift build --target GreetingGeneratorExample && \
         swift build --target NavigationExample && \
         swift build --target SplitExample && \
-        swift build --target GtkCodeGen && \
         swift build --target GtkExample
     - name: Test
       run: swift test

.github/workflows/swift-macos.yml

@@ -18,6 +18,7 @@ jobs:
       run: sed -i '' 's/-I..includedir.//g' /usr/local/Homebrew/Library/Homebrew/os/mac/pkgconfig/13/libffi.pc
     - name: Build
       run: |
+        swift build --target GtkCodeGen && \
         cd Examples && \
         swift build --target SwiftCrossUI && \
         swift build --target GtkBackend && \
@@ -28,7 +29,6 @@ jobs:
         swift build --target GreetingGeneratorExample && \
         swift build --target NavigationExample && \
         swift build --target SplitExample && \
-        swift build --target GtkCodeGen && \
         swift build --target GtkExample
     - name: Test
       run: swift test