Cleans up mac projects, and builds everything 64 bit

src/processor/stackwalker_sparc.cc

Index: src/processor/stackwalker_sparc.cc
===================================================================
--- src/processor/stackwalker_sparc.cc	(revision 623)
+++ src/processor/stackwalker_sparc.cc	(working copy)
@@ -93,7 +93,7 @@
   // A caller frame must reside higher in memory than its callee frames.
   // Anything else is an error, or an indication that we've reached the
   // end of the stack.
-  u_int32_t stack_pointer = last_frame->context.g_r[30];
+  u_int64_t stack_pointer = last_frame->context.g_r[30];
   if (stack_pointer <= last_frame->context.g_r[14]) {
     return NULL;
   }