[Remangler] Handle dependent pseudogeneric sigs.

Just use the same implementation as the OldRemangler.

Author: nate-chandler

lib/Demangling/Remangler.cpp

@@ -1212,8 +1212,7 @@ ManglingError Remangler::mangleDependentMemberType(Node *node, unsigned depth) {
 
 ManglingError Remangler::mangleDependentPseudogenericSignature(Node *node,
                                                                unsigned depth) {
-  // handled inline
-  return MANGLING_ERROR(ManglingError::UnsupportedNodeKind, node);
+  return mangleDependentGenericSignature(node, depth + 1);
 }
 
 ManglingError Remangler::mangleDestructor(Node *node, unsigned depth) {

test/Demangle/Inputs/manglings.txt

@@ -456,3 +456,4 @@ $s9MacroUser016testFreestandingA9ExpansionyyF4Foo3L_V23bitwidthNumberedStructsfM
 @__swiftmacro_1a13testStringifyAA1bySi_SitF9stringifyfMf_  ---> freestanding macro expansion #1 of stringify in a.testStringify(a: Swift.Int, b: Swift.Int) -> ()
 @__swiftmacro_18macro_expand_peers1SV1f20addCompletionHandlerfMp_ ---> peer macro @addCompletionHandler expansion #1 of f in macro_expand_peers.S
 @__swiftmacro_9MacroUser16MemberNotCoveredV33_4361AD9339943F52AE6186DD51E04E91Ll0dE0fMf0_ ---> freestanding macro expansion #2 of NotCovered(in _4361AD9339943F52AE6186DD51E04E91) in MacroUser.MemberNotCovered
+$sxSo8_NSRangeVRlzCRl_Cr0_llySo12ModelRequestCyxq_GIsPetWAlYl_TC ---> coroutine continuation prototype for @escaping @convention(thin) @convention(witness_method) @yield_once <A, B where A: AnyObject, B: AnyObject> @substituted <A> (@inout A) -> (@yields @inout __C._NSRange) for <__C.ModelRequest<A, B>>