Fix endianism issues in regexp interpreter.

src/regexp-macro-assembler-irregexp.cc

Index: src/regexp-macro-assembler-irregexp.cc
===================================================================
--- src/regexp-macro-assembler-irregexp.cc	(revision 1111)
+++ src/regexp-macro-assembler-irregexp.cc	(working copy)
@@ -60,8 +60,8 @@
     int pos = l->pos();
     while (pos != 0) {
       int fixup = pos;
-      pos = Load32(buffer_.start() + fixup);
-      Store32(buffer_.start() + fixup, pc_);
+      pos = *reinterpret_cast<int32_t*>(buffer_.start() + fixup);
+      *reinterpret_cast<uint32_t*>(buffer_.start() + fixup) = pc_;
     }
   }
   l->bind_to(pc_);