[mlir][gpu][transforms] Only depend on ExecutionEngine if MLIR_ENABLE_CUDA_RUNNER is true

This fixes a compilation bug where we would try to depend on ExecutionEngine but it wasn't actually built.

Author: nicolasvasilache

mlir/test/lib/Dialect/GPU/CMakeLists.txt

@@ -8,7 +8,6 @@ set(LIBS
   MLIRAnalysis
   MLIRArithDialect
   MLIRBuiltinToLLVMIRTranslation
-  MLIRExecutionEngine
   MLIRFuncDialect
   MLIRGPUDialect
   MLIRGPUToGPURuntimeTransforms
@@ -35,6 +34,22 @@ set(LIBS
   MLIRVectorToLLVM
   )
 
+# This is how it is defined in mlir/lib/Dialect/GPU/CMakeLists.txt
+# We probably want something better project-wide
+if(MLIR_ENABLE_CUDA_RUNNER)
+  # Enable gpu-to-cubin pass.
+  target_compile_definitions(MLIRGPUTestPasses
+    PRIVATE
+    MLIR_GPU_TO_CUBIN_PASS_ENABLE=1
+  )
+
+  set(LIBS
+    ${LIBS}
+
+    MLIRExecutionEngine
+  )
+endif()
+
 add_mlir_library(MLIRGPUTestPasses
   TestConvertGPUKernelToCubin.cpp
   TestConvertGPUKernelToHsaco.cpp
@@ -47,13 +62,3 @@ add_mlir_library(MLIRGPUTestPasses
   LINK_LIBS PUBLIC
   ${LIBS}
   )
-
-# This is how it is defined in mlir/lib/Dialect/GPU/CMakeLists.txt
-# We probably want something better project-wide
-if(MLIR_ENABLE_CUDA_RUNNER)
-  # Enable gpu-to-cubin pass.
-  target_compile_definitions(MLIRGPUTestPasses
-    PRIVATE
-    MLIR_GPU_TO_CUBIN_PASS_ENABLE=1
-  )
-endif()