Fix ghc-lib build

A section got lost during the ghcide merge

Author: pepeiborra

.github/workflows/test.yml

@@ -54,6 +54,14 @@ jobs:
             ${{ runner.os }}-${{ matrix.ghc }}-build-
             ${{ runner.os }}-${{ matrix.ghc }}
 
+      - name: ghc-lib
+        if: ${{ matrix.ghc-lib }}
+        run: |
+         echo "package ghcide" >> cabal.project.local
+         echo "  flags: ghc-lib" >> cabal.project.local
+         echo "package hie-compat" >> cabal.project.local
+         echo "  flags: ghc-lib" >> cabal.project.local
+
       - run: cabal update
 
       # Need this to work around filepath length limits in Windows