Make libbcc public.

This commit is not expected to change any functionality.
diff --git a/lib/ExecutionEngine/GDBJIT.cpp b/lib/ExecutionEngine/GDBJIT.cpp
index 4038098..29944dd 100644
--- a/lib/ExecutionEngine/GDBJIT.cpp
+++ b/lib/ExecutionEngine/GDBJIT.cpp
@@ -29,7 +29,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Support/Compiler.h"
+#include <llvm/Support/Compiler.h>
 
 // This interface must be kept in sync with gdb/gdb/jit.h .
 extern "C" {