NFC: expose an InverseRequirement::print

(cherry picked from commit 55edc30)

Author: kavon

include/swift/AST/Requirement.h

@@ -270,6 +270,8 @@ struct InverseRequirement {
   static void expandDefaults(ASTContext &ctx,
                              ArrayRef<Type> gps,
                              SmallVectorImpl<StructuralRequirement> &result);
+
+  void print(raw_ostream &os, const PrintOptions &opts, bool forInherited=false) const;
 };
 
 } // end namespace swift

lib/AST/ASTPrinter.cpp

@@ -7467,6 +7467,13 @@ void Requirement::print(ASTPrinter &printer, const PrintOptions &opts) const {
   PrintAST(printer, opts).printRequirement(*this);
 }
 
+void InverseRequirement::print(raw_ostream &os,
+                          const PrintOptions &opts,
+                          bool forInherited) const {
+  StreamPrinter printer(os);
+  PrintAST(printer, opts).printRequirement(*this, forInherited);
+}
+
 std::string GenericSignatureImpl::getAsString() const {
   return GenericSignature(const_cast<GenericSignatureImpl *>(this))
       .getAsString();