unbreak Modules/cxx20-export-import.cpp with LLVM_APPEND_VC_REV=OFF after 6635f48e4aba
See revision b8b7a9dcdcbc for prior art.
GitOrigin-RevId: 3fbbf28173406ed74c9791d172fff5c5b1aab823
diff --git a/include/clang/Serialization/ASTBitCodes.h b/include/clang/Serialization/ASTBitCodes.h
index d48e449..297af86 100644
--- a/include/clang/Serialization/ASTBitCodes.h
+++ b/include/clang/Serialization/ASTBitCodes.h
@@ -41,7 +41,7 @@
/// Version 4 of AST files also requires that the version control branch and
/// revision match exactly, since there is no backward compatibility of
/// AST files at this time.
-const unsigned VERSION_MAJOR = 21;
+const unsigned VERSION_MAJOR = 22;
/// AST file minor version number supported by this version of
/// Clang.
