Remove -Xcc -std=c++17 (swiftlang#33449)

Author: hlopko

test/Interop/Cxx/reference/reference.swift

@@ -1,6 +1,6 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-clang -c %S/Inputs/reference.cpp -I %S/Inputs -o %t/reference.o -std=c++17
-// RUN: %target-build-swift %s -I %S/Inputs -o %t/reference %t/reference.o -Xfrontend -enable-cxx-interop -Xcc -std=c++17
+// RUN: %target-build-swift %s -I %S/Inputs -o %t/reference %t/reference.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/reference
 // RUN: %target-run %t/reference
 //

test/Interop/Cxx/static/constexpr-static-member-var.swift

@@ -1,6 +1,6 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-clang -c %S/Inputs/static-member-var.cpp -I %S/Inputs -o %t/static-member-var.o -std=c++17
-// RUN: %target-build-swift %s -I %S/Inputs -o %t/statics %t/static-member-var.o -Xfrontend -enable-cxx-interop -Xcc -std=c++17
+// RUN: %target-build-swift %s -I %S/Inputs -o %t/statics %t/static-member-var.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/statics
 // RUN: %target-run %t/statics
 //

test/Interop/Cxx/static/inline-static-member-var.swift

@@ -1,6 +1,6 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-clang -c %S/Inputs/inline-static-member-var.cpp -I %S/Inputs -o %t/inline-static-member-var.o -std=c++17
-// RUN: %target-build-swift %s -I %S/Inputs -o %t/statics %t/inline-static-member-var.o -Xfrontend -enable-cxx-interop -Xcc -std=c++17
+// RUN: %target-build-swift %s -I %S/Inputs -o %t/statics %t/inline-static-member-var.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/statics
 // RUN: %target-run %t/statics 2&>1
 //

test/Interop/Cxx/static/static-var.swift

@@ -1,6 +1,6 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-clang -c %S/Inputs/static-var.cpp -I %S/Inputs -o %t/static-var.o -std=c++17
-// RUN: %target-build-swift %s -I %S/Inputs -o %t/statics %t/static-var.o -Xfrontend -enable-cxx-interop -Xcc -std=c++17
+// RUN: %target-build-swift %s -I %S/Inputs -o %t/statics %t/static-var.o -Xfrontend -enable-cxx-interop
 // RUN: %target-codesign %t/statics
 // RUN: %target-run %t/statics
 //