[pseudo] Use the prebuilt cxx grammar for the lit tests, NFC.

Differential Revision: https://reviews.llvm.org/D129074

clang-tools-extra/pseudo/test/cxx/capture-list.cpp

@@ -1,4 +1,4 @@
-// RUN: clang-pseudo -grammar=%cxx-bnf-file -source=%s --print-forest | FileCheck %s
+// RUN: clang-pseudo -grammar=cxx -source=%s --print-forest | FileCheck %s
 // We loosely allow capture defaults in any position/multiple times.
 auto lambda = [&, &foo, bar(x), =]{};
 // CHECK:      lambda-introducer := [ capture-list ]

clang-tools-extra/pseudo/test/cxx/declarator-function.cpp

@@ -4,7 +4,7 @@
 // FIXME: eliminate this false parse.
 // XFAIL: *
 
-// RUN: clang-pseudo -grammar=%cxx-bnf-file -source=%s --print-forest | FileCheck %s
+// RUN: clang-pseudo -grammar=cxx -source=%s --print-forest | FileCheck %s
 void s(){};
 // CHECK-NOT:      simple-declaration
 // CHECK:          function-definition := decl-specifier-seq declarator

clang-tools-extra/pseudo/test/cxx/declarator-var.cpp

@@ -4,7 +4,7 @@
 // FIXME: eliminate this false parse.
 // XFAIL: *
 
-// RUN: clang-pseudo -grammar=%cxx-bnf-file -source=%s --print-forest | FileCheck %s
+// RUN: clang-pseudo -grammar=cxx -source=%s --print-forest | FileCheck %s
 void (*s)(){};
 // CHECK-NOT:      function-definition
 // CHECK:          init-declarator := declarator initializer

clang-tools-extra/pseudo/test/cxx/empty-member-spec.cpp

@@ -1,4 +1,4 @@
-// RUN: clang-pseudo -grammar=%cxx-bnf-file -source=%s --print-forest | FileCheck %s
+// RUN: clang-pseudo -grammar=cxx -source=%s --print-forest | FileCheck %s
 class Foo {
 public:
 };

clang-tools-extra/pseudo/test/cxx/keyword.cpp

@@ -1,4 +1,4 @@
-// RUN: clang-pseudo -grammar=%cxx-bnf-file -source=%s --print-forest | FileCheck %s
+// RUN: clang-pseudo -grammar=cxx -source=%s --print-forest | FileCheck %s
 bool operator<();
 // CHECK:      translation-unit~simple-declaration := decl-specifier-seq init-declarator-list ;
 // CHECK-NEXT: ├─decl-specifier-seq~BOOL

clang-tools-extra/pseudo/test/cxx/mixed-designator.cpp

@@ -1,4 +1,4 @@
-// RUN: clang-pseudo -grammar=%cxx-bnf-file -source=%s --print-forest | FileCheck %s
+// RUN: clang-pseudo -grammar=cxx -source=%s --print-forest | FileCheck %s
 // FIXME: tighten CHECK to CHECK-NEXT once numeric literals are unambiguous.
 auto x = { 1, .f = 2, [c]{3} };
 // CHECK:      initializer-clause~braced-init-list

clang-tools-extra/pseudo/test/cxx/parameter-decl-clause.cpp

@@ -1,4 +1,4 @@
-// RUN: clang-pseudo -grammar=%cxx-bnf-file -source=%s --print-forest | FileCheck %s
+// RUN: clang-pseudo -grammar=cxx -source=%s --print-forest | FileCheck %s
 void foo2(int, ...);
 // CHECK:      translation-unit~simple-declaration := decl-specifier-seq init-declarator-list ;
 // CHECK-NEXT: ├─decl-specifier-seq~VOID :=

clang-tools-extra/pseudo/test/cxx/predefined-identifier.cpp

@@ -1,4 +1,4 @@
-// RUN: clang-pseudo -grammar=%cxx-bnf-file -source=%s --print-forest | FileCheck %s
+// RUN: clang-pseudo -grammar=cxx -source=%s --print-forest | FileCheck %s
 void s() {
   __func__;
   // CHECK: expression~__FUNC__ := tok[5]

clang-tools-extra/pseudo/test/cxx/template-empty-type-parameter.cpp

@@ -1,3 +1,3 @@
-// RUN: clang-pseudo -grammar=%cxx-bnf-file -source=%s --print-forest | FileCheck %s
+// RUN: clang-pseudo -grammar=cxx -source=%s --print-forest | FileCheck %s
 template <typename> struct MatchParents;
 // CHECK: template-parameter-list~TYPENAME := tok[2]

clang-tools-extra/pseudo/test/cxx/unsized-array.cpp

@@ -1,4 +1,4 @@
-// RUN: clang-pseudo -grammar=%cxx-bnf-file -source=%s --print-forest | FileCheck %s
+// RUN: clang-pseudo -grammar=cxx -source=%s --print-forest | FileCheck %s
 void s(int[]);
 // CHECK:      parameter-declaration-clause~parameter-declaration := decl-specifier-seq abstract-declarator
 // CHECK-NEXT: ├─decl-specifier-seq~INT := tok[3]