[WebAssembly] Rename wasm fixup kinds

These fixup kinds are not explicitly related to the code section.  They
are there to signal how to apply the fixup.

Also, a couple of other minor wasm cleanups.

Differential Revision: https://reviews.llvm.org/D59908

llvm-svn: 357145
diff --git a/llvm/lib/MC/WasmObjectWriter.cpp b/llvm/lib/MC/WasmObjectWriter.cpp
index adf0aef..4c60952 100644
--- a/llvm/lib/MC/WasmObjectWriter.cpp
+++ b/llvm/lib/MC/WasmObjectWriter.cpp
@@ -269,9 +269,6 @@
 
   // TargetObjectWriter wrappers.
   bool is64Bit() const { return TargetObjectWriter->is64Bit(); }
-  unsigned getRelocType(const MCValue &Target, const MCFixup &Fixup) const {
-    return TargetObjectWriter->getRelocType(Target, Fixup);
-  }
 
   void startSection(SectionBookkeeping &Section, unsigned SectionId);
   void startCustomSection(SectionBookkeeping &Section, StringRef Name);
@@ -508,7 +505,7 @@
   // be negative and don't wrap.
   FixedValue = 0;
 
-  unsigned Type = getRelocType(Target, Fixup);
+  unsigned Type = TargetObjectWriter->getRelocType(Target, Fixup);
   assert(!IsPCRel);
   assert(SymA);