Fix build

Author: kovdan01

include/swift/AST/ASTBridging.h

@@ -319,8 +319,7 @@ struct BridgedDeclObj {
 #endif
 
   BridgedDeclObj(SwiftObject obj) : obj(obj) {}
-  BridgedDeclObj(BridgedDecl decl)
-      : obj(static_cast<SwiftObject>(decl.unbridged())) {}
+  BRIDGED_INLINE BridgedDeclObj(BridgedDecl decl);
   BridgedOwnedString getDebugDescription() const;
   BRIDGED_INLINE swift::SourceLoc getLoc() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedDeclObj getModuleContext() const;

include/swift/AST/ASTBridgingImpl.h

@@ -165,6 +165,9 @@ BridgedFileUnit_castToSourceFile(BridgedFileUnit fileUnit) {
 // MARK: BridgedDeclObj
 //===----------------------------------------------------------------------===//
 
+BridgedDeclObj::BridgedDeclObj(BridgedDecl decl)
+    : obj(static_cast<SwiftObject>(decl.unbridged())) {}
+
 swift::SourceLoc BridgedDeclObj::getLoc() const {
   return unbridged()->getLoc();
 }