Fix compile with debuggersupport=off.

Makefile

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 55 matching lines @@
   GYPFLAGS += -Dv8_enable_gdbjit=1
 endif
 # liveobjectlist=on
 ifeq ($(liveobjectlist), on)
   GYPFLAGS += -Dv8_use_liveobjectlist=true
 endif
 # vfp3=off
 ifeq ($(vfp3), off)
   GYPFLAGS += -Dv8_can_use_vfp_instructions=false
 else
   GYPFLAGS += -Dv8_can_use_vfp_instructions=true

[Yang, 2012/03/07 10:47:41]

@Jakob: Is there any reason why we have true/false and 1/0 values mixed? And is
there any reason why don't rely on the default value in common.gypi
('v8_can_use_vfp_instructions%': 'false') for the else-case?

 endif
+# debuggersupport=off
+ifeq ($(debuggersupport), off)
+  GYPFLAGS += -Dv8_enable_debugger_support=0
+endif
 # soname_version=1.2.3
 ifdef soname_version
   GYPFLAGS += -Dsoname_version=$(soname_version)
 endif
 # werror=no
 ifeq ($(werror), no)
   GYPFLAGS += -Dwerror=''
 endif
 # presubmit=no
 ifeq ($(presubmit), no)
@@ skipping 162 matching lines @@
             else mv $(ENVFILE).new $(ENVFILE); fi
 
 # Stores current GYPFLAGS in a file.
 $(ENVFILE).new:
         @mkdir -p $(OUTDIR); echo "GYPFLAGS=$(GYPFLAGS)" > $(ENVFILE).new;
 
 # Dependencies.
 dependencies:
         svn checkout --force http://gyp.googlecode.com/svn/trunk build/gyp \
             --revision 1026