[flang] Disable two tests as error is being downgraded (#161)

Fortran/gfortran/regression/restricted_expression_2.f90 and
Fortran/gfortran/regression/restricted_expression_3.f90 are
disabled with this patch, as the condition that they test will
soon no longer be an error with flang, just a warning.
(This is the use of a local variable with proper initialization
and the SAVE attribute being used as part of a specification
expression.)

Author: klausler

Fortran/gfortran/regression/DisabledFiles.cmake

@@ -1301,6 +1301,8 @@ file(GLOB FAILING_FILES CONFIGURE_DEPENDS
   pr95614_2.f90
   pr95882_3.f90
   recursive_check_3.f90
+  restricted_expression_2.f90
+  restricted_expression_3.f90
   return_1.f90
   size_kind_3.f90
   string_3.f90