Fixing swift-clang tests that fail due to missing PrintingPolicy init in ctor.
Fixing swift-clang tests that fail due to missing PrintingPolicy init in ctor.

The following tests that were failing were:

    Clang :: OpenMP/for_simd_ast_print.cpp
    Clang :: OpenMP/simd_ast_print.cpp
    Clang-Unit :: AST/./ASTTests/DeclPrinter.TestFunctionDecl4
    Clang-Unit :: AST/./ASTTests/DeclPrinter.TestFunctionDecl5

They were failing because SupressStorageClassSpecifiers not being properly
initialized in PrintingPolicy in include/clang/AST/PrettyPrinter.h and when it
was used in lib/AST/DeclPrinter.cpp "static" was not being printed:

  if (!Policy.SuppressSpecifiers) {
    if (!Policy.SupressStorageClassSpecifiers) {
      switch (D->getStorageClass()) {
      case SC_None: break;
      case SC_Extern: Out << "extern "; break;
      case SC_Static: Out << "static "; break;

These tests pass in upstream clang because SupressStorageClassSpecifiers was
never pushed upstream.

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