Fix using kArm instead of kThumb2.

Change-Id: I0f3bf93b38d910bc57d017693675829b6a39bc18
diff --git a/compiler/elf_writer_quick.cc b/compiler/elf_writer_quick.cc
index f6a324f..e88ed42 100644
--- a/compiler/elf_writer_quick.cc
+++ b/compiler/elf_writer_quick.cc
@@ -367,6 +367,8 @@
   elf_header.e_ident[EI_ABIVERSION] = 0;
   elf_header.e_type = ET_DYN;
   switch (compiler_driver_->GetInstructionSet()) {
+    case kArm:
+      // Fall through.
     case kThumb2: {
       elf_header.e_machine = EM_ARM;
       elf_header.e_flags = EF_ARM_EABI_VER5;
@@ -396,7 +398,6 @@
                             EF_MIPS_ARCH_32R2);
       break;
     }
-    case kArm:
     default: {
       LOG(FATAL) << "Unknown instruction set: " << compiler_driver_->GetInstructionSet();
       break;