Fix various typos in ART's comments and string literals.

Change-Id: I85d628055b1a61647a77fef730c9631c234e22a2
diff --git a/compiler/elf_writer_debug.cc b/compiler/elf_writer_debug.cc
index 3e64762..e03614f 100644
--- a/compiler/elf_writer_debug.cc
+++ b/compiler/elf_writer_debug.cc
@@ -212,7 +212,7 @@
     case kNone:
       break;
   }
-  LOG(FATAL) << "Can not write CIE frame for ISA " << isa;
+  LOG(FATAL) << "Cannot write CIE frame for ISA " << isa;
   UNREACHABLE();
 }