RFR; 8077420: Build failure with SS12u4

[Stefan Karlsson]

Hi,

Please review this fix for a build failure that was encountered during 
the Solaris Studio compiler upgrade.

Two files were missing an include of stack.inline.hpp, which is needed 
to get the definition of default_segment_size(). This function is used 
in the stack.hpp, to provide the default value to the constructor. This 
forces all users of Stacks with the default segment size, to have to 
include stack.inline.hpp. The default_segment_size() implementation 
always evaluates to the same value, given the template parameters, so I 
chose to setup a constant in the header instead of adding the missing 
stack.inline.hpp files.

http://cr.openjdk.java.net/~stefank/8077420/webrev.01/
https://bugs.openjdk.java.net/browse/JDK-8077420

Tested with JPRT, and built with SS12u4.

Thanks,
StefanK