[NFC][flang] Replace use of flang -fc1 with %flang_fc1 in few test case (llvm#168830)

Replace use of flang -fc1 with %flang_fc1 in few test case

Author: kiranktp

flang/test/Lower/Intrinsics/command_argument_count.f90

@@ -1,6 +1,6 @@
 ! RUN: bbc -emit-fir %s -o - | FileCheck %s
 ! bbc doesn't have a way to set the default kinds so we use flang driver
-! RUN: flang -fc1 -fdefault-integer-8 -emit-fir %s -o - | FileCheck --check-prefixes=CHECK,CHECK-64  %s
+! RUN: %flang_fc1 -fdefault-integer-8 -emit-fir %s -o - | FileCheck --check-prefixes=CHECK,CHECK-64  %s
 
 ! CHECK-LABEL: argument_count_test
 subroutine argument_count_test()

flang/test/Lower/Intrinsics/modulo.f90

@@ -1,5 +1,5 @@
 ! RUN: bbc -emit-fir -hlfir=false %s -o - | FileCheck %s -check-prefixes=HONORINF,ALL
-! RUN: flang -fc1 -menable-no-infs -emit-fir -flang-deprecated-no-hlfir %s -o - | FileCheck %s -check-prefixes=CHECK,ALL,%if flang-supports-f128-math %{F128%} %else %{F64%}
+! RUN: %flang_fc1 -menable-no-infs -emit-fir -flang-deprecated-no-hlfir %s -o - | FileCheck %s -check-prefixes=CHECK,ALL,%if flang-supports-f128-math %{F128%} %else %{F64%}
 
 ! ALL-LABEL: func @_QPmodulo_testr(
 ! ALL-SAME: %[[arg0:.*]]: !fir.ref<f64>{{.*}}, %[[arg1:.*]]: !fir.ref<f64>{{.*}}, %[[arg2:.*]]: !fir.ref<f64>{{.*}}) {

flang/test/Lower/OpenMP/Todo/omp-clause-indirect.f90

@@ -1,6 +1,6 @@
 ! This test checks the lowering of OpenMP Indirect Clause when used with the Declare Target directive
 
-! RUN: not flang -fc1 -emit-fir -fopenmp -fopenmp-version=52 %s 2>&1 | FileCheck %s
+! RUN: not %flang_fc1 -emit-fir -fopenmp -fopenmp-version=52 %s 2>&1 | FileCheck %s
 
 module functions
   implicit none

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

flang/test/Lower/OpenMP/Todo/omp-declare-reduction-initsub.f90

@@ -1,7 +1,7 @@
 ! This test checks lowering of OpenMP declare reduction Directive, with initialization
 ! via a subroutine. This functionality is currently not implemented.
 
-! RUN: not flang -fc1 -emit-fir -fopenmp %s 2>&1 | FileCheck %s
+! RUN: not %flang_fc1 -emit-fir -fopenmp %s 2>&1 | FileCheck %s
 
 !CHECK: not yet implemented: OpenMPDeclareReductionConstruct
 subroutine initme(x,n)

flang/test/Lower/OpenMP/Todo/omp-declare-reduction.f90

@@ -1,6 +1,6 @@
 ! This test checks lowering of OpenMP declare reduction 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
 
 subroutine declare_red()
   integer :: my_var

flang/test/Lower/OpenMP/Todo/omp-declare-simd.f90

@@ -1,6 +1,6 @@
 ! This test checks lowering of OpenMP declare simd 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
 
 subroutine sub(x, y)
   real, intent(inout) :: x, y

flang/test/Lower/OpenMP/cray-pointers01.f90

@@ -1,5 +1,5 @@
 ! Test lowering of Cray pointee references.
-! RUN: flang -fc1 -emit-hlfir -fopenmp %s -o - 2>&1 | FileCheck %s
+! RUN: %flang_fc1 -emit-hlfir -fopenmp %s -o - 2>&1 | FileCheck %s
 
 module test_host_assoc_cray_pointer
   ! CHECK-LABEL: fir.global @_QMtest_host_assoc_cray_pointerEivar : i64

flang/test/Lower/OpenMP/cray-pointers02.f90

@@ -1,5 +1,5 @@
 ! Test lowering of Cray pointee references.
-! RUN: flang -fc1 -emit-hlfir -fopenmp %s -o - 2>&1 | FileCheck %s
+! RUN: %flang_fc1 -emit-hlfir -fopenmp %s -o - 2>&1 | FileCheck %s
 
 ! CHECK-LABEL: func.func @_QQmain() attributes {fir.bindc_name = "TEST_CRAY_POINTERS_02"}
 program test_cray_pointers_02

flang/test/Lower/OpenMP/parallel-lastprivate-clause-scalar.f90

@@ -1,7 +1,7 @@
 ! This test checks lowering of `LASTPRIVATE` clause for scalar types.
 
 ! RUN: bbc -fopenmp -emit-hlfir %s -o - | FileCheck %s
-! RUN: flang -fc1 -fopenmp -emit-hlfir %s -o - | FileCheck %s
+! RUN: %flang_fc1 -fopenmp -emit-hlfir %s -o - | FileCheck %s
 
 !CHECK: func @_QPlastprivate_character(%[[ARG1:.*]]: !fir.boxchar<1>{{.*}}) {
 !CHECK-DAG: %[[ARG1_UNBOX:.*]]:2 = fir.unboxchar