add lit restrictions to cpu builds also

Author: Garra1980

.github/workflows/build_cpu.yml

@@ -57,7 +57,7 @@ jobs:
       - name: Setup IMEX and run tests
         run: |
           cd $HOME_DIR/frameworks.ai.mlir.mlir-extensions
-          cmake -S $BUILD_ROOT/llvm-project/llvm -B build -GNinja  -DCMAKE_BUILD_TYPE=Release  -DLLVM_ENABLE_PROJECTS=mlir -DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_USE_LINKER=gold -DLLVM_ENABLE_ZSTD=OFF -DLLVM_EXTERNAL_PROJECTS="Imex" -DLLVM_EXTERNAL_IMEX_SOURCE_DIR=. -DLLVM_LIT_ARGS=-a
+          cmake -S $BUILD_ROOT/llvm-project/llvm -B build -GNinja  -DCMAKE_BUILD_TYPE=Release  -DLLVM_ENABLE_PROJECTS=mlir -DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_USE_LINKER=gold -DLLVM_ENABLE_ZSTD=OFF -DLLVM_EXTERNAL_PROJECTS="Imex" -DLLVM_EXTERNAL_IMEX_SOURCE_DIR=. -DLLVM_LIT_ARGS="-a -j 4 --debug --timeout=1800"
           set -o pipefail
           cmake --build build --target check-imex | tee build/tests.txt