[cxx-interop] Fix tests that passed -module-name Swift

`Swift` is the name of the Swift standard library module. Creating another module with this name breaks assumptions in the compiler and caused these two tests to fail.

Author: egorzhdan

test/Interop/Cxx/class/constructors-copy-irgen.swift

@@ -1,8 +1,8 @@
 // Target-specific tests for C++ copy constructor code generation.
 
-// RUN: %swift -module-name Swift -target x86_64-apple-macosx10.9 -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_X64
-// RUN: %swift -module-name Swift -target armv7-none-linux-androideabi -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_ARM
-// RUN: %swift -module-name Swift -target x86_64-unknown-windows-msvc -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=MICROSOFT_X64
+// RUN: %swift -module-name CxxConstructors -target x86_64-apple-macosx10.9 -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_X64
+// RUN: %swift -module-name CxxConstructors -target armv7-none-linux-androideabi -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_ARM
+// RUN: %swift -module-name CxxConstructors -target x86_64-unknown-windows-msvc -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=MICROSOFT_X64
 
 import Constructors
 import TypeClassification

test/Interop/Cxx/class/constructors-irgen.swift

@@ -1,8 +1,8 @@
 // Target-specific tests for C++ constructor call code generation.
 
-// RUN: %swift -module-name Swift -target x86_64-apple-macosx10.9 -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_X64
-// RUN: %swift -module-name Swift -target armv7-unknown-linux-androideabi -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_ARM
-// RUN: %swift -module-name Swift -target x86_64-unknown-windows-msvc -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=MICROSOFT_X64
+// RUN: %swift -module-name CxxConstructors -target x86_64-apple-macosx10.9 -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_X64
+// RUN: %swift -module-name CxxConstructors -target armv7-unknown-linux-androideabi -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_ARM
+// RUN: %swift -module-name CxxConstructors -target x86_64-unknown-windows-msvc -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=MICROSOFT_X64
 
 import Constructors
 import TypeClassification