configure.ac: fix last commit, the filename was wrong

configure.ac

@@ -571,7 +571,7 @@ AC_DEFUN([STARPU_CHECK_CUDA],
 		AC_MSG_RESULT(no)
 		NVCCFLAGS="$OLD_NVCCFLAGS"
 	    fi
-	    rm -f test_cuda*
+	    rm -f cuda_test*
 	fi
 
 	# nvcc is a wrapper around GCC, and calls it with the -dumpspecs