Review request (XS): 7167437 - Can't build on linux without precompiled headers

[Stefan Karlsson]

http://cr.openjdk.java.net/~stefank/7167437/webrev/

The inline function set_concurrent_iteration_safe_limit is not available 
when building binaryTreeDictionary.cpp. This breaks the build when 
compiling with USE_PRECOMPILED_HEADER=0.

I moved the simple implementation to the .hpp file instead of the 
.inline.hpp file.

StefanK