Bump the module format version

We've changed *what* is serialized by changing the way
@_dynamicReplacement is type checked, but not *how* it's
serialized.  Bump the format so there aren't strange incompatibilities
because of this.

Author: CodaFi

lib/IRGen/GenDecl.cpp

@@ -2369,7 +2369,7 @@ static void emitDynamicallyReplaceableThunk(IRGenModule &IGM,
 void IRGenModule::emitOpaqueTypeDescriptorAccessor(OpaqueTypeDecl *opaque) {
   auto *namingDecl = opaque->getNamingDecl();
   auto *abstractStorage = dyn_cast<AbstractStorageDecl>(namingDecl);
-  
+
   bool isNativeDynamic = false;
   const bool isDynamicReplacement = namingDecl->getDynamicallyReplacedDecl();
 

lib/Sema/TypeCheckDeclObjC.cpp

@@ -1048,9 +1048,6 @@ Optional<ObjCReason> shouldMarkAsObjC(const ValueDecl *VD, bool allowImplicit) {
       if (auto *replaced = VD->getDynamicallyReplacedDecl()) {
         if (replaced->isObjC())
           return ObjCReason(ObjCReason::ImplicitlyObjC);
-      } else if (auto *replaced = VD->getDynamicallyReplacedDecl()) {
-        if (replaced->isObjC())
-          return ObjCReason(ObjCReason::ImplicitlyObjC);
       }
     }
 

lib/Serialization/ModuleFormat.h

@@ -52,7 +52,7 @@ const uint16_t SWIFTMODULE_VERSION_MAJOR = 0;
 /// describe what change you made. The content of this comment isn't important;
 /// it just ensures a conflict if two people change the module format.
 /// Don't worry about adhering to the 80-column limit for this line.
-const uint16_t SWIFTMODULE_VERSION_MINOR = 525; // target formal type for casts
+const uint16_t SWIFTMODULE_VERSION_MINOR = 526; // @_dynamicReplacement adjustments
 
 /// A standard hash seed used for all string hashes in a serialized module.
 ///