Swap cp and pp registers on Arm such for work on OOL Constant Pool.

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 467a1ac4b78d0bd946d8020328bf1db0b137b326..d223b57a5a509202add60f9d3ecf869c7561f7a6 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -45,8 +45,8 @@ inline MemOperand FieldMemOperand(Register object, int offset) {
 
 
 // Give alias names to registers
-const Register pp = { kRegister_r7_Code };  // Constant pool pointer.
-const Register cp = { kRegister_r8_Code };  // JavaScript context pointer.
+const Register cp = { kRegister_r7_Code };  // JavaScript context pointer.
+const Register pp = { kRegister_r8_Code };  // Constant pool pointer.
 const Register kRootRegister = { kRegister_r10_Code };  // Roots array pointer.
 
 // Flags used for AllocateHeapNumber