fixup! ast-exporter: Guard RISCV types introduced in LLVM 13

Author: chrysn

c2rust-ast-exporter/src/AstExporter.cpp

@@ -323,10 +323,10 @@ class TypeEncoder final : public TypeVisitor<TypeEncoder> {
 
 #if CLANG_VERSION_MAJOR >= 10
         // Handle built-in vector types as if they're normal vector types
-        if (kind >= BuiltinType::SveInt8 && kind <= BuiltinType::SveBool ||
+        if (kind >= BuiltinType::SveInt8 && kind <= BuiltinType::SveBool
 #if CLANG_VERSION_MAJOR >= 13
             /* RISC-V vector types */
-            kind >= clang::BuiltinType::RvvInt8mf8 && kind <= clang::BuiltinType::RvvBool64
+            || kind >= clang::BuiltinType::RvvInt8mf8 && kind <= clang::BuiltinType::RvvBool64
 #endif // CLANG_VERSION_MAJOR >= 13
             ) {
 // Declare ElemType and ElemCount as needed by various Clang versions