ARM: Fix bug in r4820 related to code for additional break positions....

src/arm/debug-arm.cc

Index: src/arm/debug-arm.cc
===================================================================
--- src/arm/debug-arm.cc	(revision 4825)
+++ src/arm/debug-arm.cc	(working copy)
@@ -263,7 +263,9 @@
 
 
 void Debug::GenerateSlot(MacroAssembler* masm) {
-  // Generate enough nop's to make space for a call instruction.
+  // Generate enough nop's to make space for a call instruction. Avoid emitting
+  // the constant pool in the debug break slot code.
+  Assembler::BlockConstPoolScope block_const_pool(masm);
   Label check_codesize;
   __ bind(&check_codesize);
   __ RecordDebugBreakSlot();