Subzero: Add -Wshadow to the build.

src/IceAssembler.h

Index: src/IceAssembler.h
diff --git a/src/IceAssembler.h b/src/IceAssembler.h
index 437dfc33ad2b8d737a1f48ac59f952dea1740ab6..8ae935592c5c9a7d1c1f34521b90c30aba3b9bf9 100644
--- a/src/IceAssembler.h
+++ b/src/IceAssembler.h
@@ -76,7 +76,7 @@ public:
     EnsureCapacity &operator=(const EnsureCapacity &) = delete;
 
   public:
-    explicit EnsureCapacity(AssemblerBuffer *Buffer) : Buffer(Buffer) {
+    explicit EnsureCapacity(AssemblerBuffer *MyBuffer) : Buffer(MyBuffer) {
       if (Buffer->cursor() >= Buffer->limit())
         Buffer->extendCapacity();
       if (BuildDefs::asserts())
@@ -195,8 +195,8 @@ public:
 
   const FixupRefList &fixups() const { return Buffer.fixups(); }
 
-  AssemblerFixup *createFixup(FixupKind Kind, const Constant *Value) {
-    return Buffer.createFixup(Kind, Value);
+  AssemblerFixup *createFixup(FixupKind FKind, const Constant *Value) {
+    return Buffer.createFixup(FKind, Value);
   }
 
   void emitIASBytes(GlobalContext *Ctx) const;
@@ -213,8 +213,8 @@ public:
   AssemblerKind getKind() const { return Kind; }
 
 protected:
-  explicit Assembler(AssemblerKind Kind)
-      : Kind(Kind), Allocator(), Buffer(*this) {}
+  explicit Assembler(AssemblerKind MyKind)
+      : Kind(MyKind), Allocator(), Buffer(*this) {}
 
 private:
   const AssemblerKind Kind;