fix failing test

Author: Stylie777

flang/test/Lower/OpenMP/Todo/omp-declarative-allocate.f90

@@ -1,6 +1,6 @@
 ! This test checks lowering of OpenMP allocate Directive.
 
-// RUN: not flang -fc1 -emit-fir -fopenmp %s 2>&1 | FileCheck %s
+! RUN: not flang -fc1 -emit-fir -fopenmp %s 2>&1 | FileCheck %s
 
 program main
   integer :: x, y