review(XXS): 7043564: compile warning and copyright fixes

[Igor Veresov]

Compilation fails on newer GCCs with :
os_linux.cpp: In static member function ‘static bool 
os::Linux::hugetlbfs_sanity_check(bool, size_t)’:
os_linux.cpp:2853:43: error: use of assignment suppression and length 
modifier together in gnu_scanf format
The solution is to remove the length modifier.

Also, copyrights needed to be fixed in a couple of files.

Webrev: http://cr.openjdk.java.net/~iveresov/7043564/webrev.00/

Thanks,
igor