Mark headers as textual and unbreak the modules build

Author: adrian-prantl

clang/include/module.modulemap

@@ -49,6 +49,9 @@ module Clang_Basic {
   textual header "clang/Basic/BuiltinsHexagonDep.def"
   textual header "clang/Basic/BuiltinsHexagonMapCustomDep.def"
   textual header "clang/Basic/BuiltinsLoongArch.def"
+  textual header "clang/Basic/BuiltinsLoongArchBase.def"
+  textual header "clang/Basic/BuiltinsLoongArchLSX.def"
+  textual header "clang/Basic/BuiltinsLoongArchLASX.def"
   textual header "clang/Basic/BuiltinsMips.def"
   textual header "clang/Basic/BuiltinsNEON.def"
   textual header "clang/Basic/BuiltinsNVPTX.def"