Fix test failure

Because #145220 removes the remark which is always emitted if the
modules driver is enabled, some tests fail because Clang emits no
output at all. FileCheck will then complain about empty stdin.
We fix this by using '-v' to ensure any output.

Author: naveen-seth

clang/test/Driver/modules-driver-cxx20-module-usage-scanner.cpp

@@ -105,14 +105,14 @@ module;
 export module A;
 
 //--- comment-line-splice.cpp
-// RUN: %clang -std=c++23 -ccc-print-phases -fmodules-driver -Rmodules-driver \
+// RUN: %clang -std=c++23 -v -ccc-print-phases -fmodules-driver -Rmodules-driver \
 // RUN: %t/comment-line-splice.cpp %t/empty.cpp 2>&1 | FileCheck %s --check-prefix=CHECK13
 // CHECK13-NOT: remark: found C++20 module usage in file '{{.*}}' [-Rmodules-driver]
 // My comment continues next-line!\
 import A;
 
 //--- comment-line-splice-trailing-whitespace.cpp
-// RUN: %clang -std=c++23 -ccc-print-phases -fmodules-driver -Rmodules-driver \
+// RUN: %clang -std=c++23 -v -ccc-print-phases -fmodules-driver -Rmodules-driver \
 // RUN: %t/comment-line-splice-trailing-whitespace.cpp %t/empty.cpp 2>&1 | FileCheck %s --check-prefix=CHECK14
 // CHECK14-NOT: remark: found C++20 module usage in file '{{.*}}' [-Rmodules-driver]
 // My comment continues next-line! This backslash has trailing whitespace. -> \   
@@ -136,31 +136,31 @@ export\
   A;
 
 //--- no-module-usage1.cpp
-// RUN: %clang -std=c++23 -ccc-print-phases -fmodules-driver -Rmodules-driver -ccc-print-phases \
+// RUN: %clang -std=c++23 -v -ccc-print-phases -fmodules-driver -Rmodules-driver -ccc-print-phases \
 // RUN: %t/no-module-usage1.cpp %t/empty.cpp 2>&1 | FileCheck %s --check-prefix=CHECK17
 // CHECK17-NOT: remark: found C++20 module usage in file '{{.*}}' [-Rmodules-driver]
 auto main() -> int {}
 
 //--- no-module-usage2.cpp
-// RUN: %clang -std=c++23 -ccc-print-phases -fmodules-driver -Rmodules-driver -ccc-print-phases \
+// RUN: %clang -std=c++23 -v -ccc-print-phases -fmodules-driver -Rmodules-driver -ccc-print-phases \
 // RUN: %t/no-module-usage2.cpp %t/empty.cpp 2>&1 | FileCheck %s --check-prefix=CHECK18
 // CHECK18-NOT: remark: found C++20 module usage in file '{{.*}}' [-Rmodules-driver]
 moduleStruct{};
 
 //--- no-module-usage3.cpp
-// RUN: %clang -std=c++23 -ccc-print-phases -fmodules-driver -Rmodules-driver -ccc-print-phases \
+// RUN: %clang -std=c++23 -v -ccc-print-phases -fmodules-driver -Rmodules-driver -ccc-print-phases \
 // RUN: %t/no-module-usage3.cpp %t/empty.cpp 2>&1 | FileCheck %s --check-prefix=CHECK19
 // CHECK19-NOT: remark: found C++20 module usage in file '{{.*}}' [-Rmodules-driver]
 export_struct{};
 
 //--- no-module-usage-namespace-import.cpp
-// RUN: %clang -std=c++23 -ccc-print-phases -fmodules-driver -Rmodules-driver -ccc-print-phases \
+// RUN: %clang -std=c++23 -v -ccc-print-phases -fmodules-driver -Rmodules-driver -ccc-print-phases \
 // RUN: %t/no-module-usage-namespace-import.cpp %t/empty.cpp 2>&1 | FileCheck %s --check-prefix=CHECK20
 // CHECK20-NOT: remark: found C++20 module usage in file '{{.*}}' [-Rmodules-driver]
 import::inner xi = {};
 
 //--- no-module-usage-namespace-module.cpp
-// RUN: %clang -std=c++23 -ccc-print-phases -fmodules-driver -Rmodules-driver -ccc-print-phases \
+// RUN: %clang -std=c++23 -v -ccc-print-phases -fmodules-driver -Rmodules-driver -ccc-print-phases \
 // RUN: %t/no-module-usage-namespace-module.cpp %t/empty.cpp 2>&1 | FileCheck %s --check-prefix=CHECK21
 // CHECK21-NOT: remark: found C++20 module usage in file '{{.*}}' [-Rmodules-driver]
 module::inner yi = {};