[ClangImporter] Do not import DynamicRangePointerType and ValueTerminatedType

DynamicRangePointerType and ValueTerminatedType are new Clang
types for -fbounds-safety, annotated  with the 'ended_by' and the
'terminated_by' attributes. This adds visitors for these types in
ClangImporter so Swift still builds with Clang that has these new
types.

Author: rapidsna

lib/ClangImporter/ImportType.cpp

@@ -421,6 +421,22 @@ namespace {
       return Type();
     }
 
+    ImportResult VisitDynamicRangePointerType(
+        const clang::DynamicRangePointerType *type) {
+      // DynamicRangePointerType is a clang type representing a pointer with
+      // a Firebloom "ended_by" type attribute. For now, we don't import these
+      // into Swift.
+      return Type();
+    }
+
+    ImportResult VisitValueTerminatedType(
+        const clang::ValueTerminatedType *type) {
+      // ValueTerminatedType is a clang type representing a pointer with
+      // a Firebloom "terminated_by" type attribute. For now, we don't import
+      // these into Swift.
+      return Type();
+    }
+
     ImportResult VisitMemberPointerType(const clang::MemberPointerType *type) {
       return Type();
     }