[WebAssembly] Add InputChunk as common base class for InputSegment and InputFunction. NFC.

Differential Revision: https://reviews.llvm.org/D41419

llvm-svn: 322148
diff --git a/lld/wasm/SymbolTable.cpp b/lld/wasm/SymbolTable.cpp
index 573739a..8706698 100644
--- a/lld/wasm/SymbolTable.cpp
+++ b/lld/wasm/SymbolTable.cpp
@@ -10,7 +10,7 @@
 #include "SymbolTable.h"
 
 #include "Config.h"
-#include "InputFunction.h"
+#include "InputChunks.h"
 #include "WriterUtils.h"
 #include "lld/Common/ErrorHandler.h"
 #include "lld/Common/Memory.h"