Start incorporating the ARM integrated assembler.

src/IceAssemblerX86Base.h

Index: src/IceAssemblerX86Base.h
diff --git a/src/IceAssemblerX86Base.h b/src/IceAssemblerX86Base.h
index f9de5a525b37aace2f77973ac1742654427c0a1f..6b8f3c1b0f531f1a3a10380ca66935e4961faec0 100644
--- a/src/IceAssemblerX86Base.h
+++ b/src/IceAssemblerX86Base.h
@@ -115,8 +115,9 @@ template <class Machine> class AssemblerX86Base : public Assembler {
   AssemblerX86Base &operator=(const AssemblerX86Base &) = delete;
 
 protected:
-  AssemblerX86Base(AssemblerKind Kind, bool use_far_branches)
-      : Assembler(Kind) {
+  AssemblerX86Base(AssemblerKind Kind, GlobalContext *Ctx,
+                   bool use_far_branches)
+      : Assembler(Kind, Ctx) {
     // This mode is only needed and implemented for MIPS and ARM.
     assert(!use_far_branches);
     (void)use_far_branches;