WL#4974: Add large page support for Solaris

Added large page support for Solaris.
In MySQL 5.4.0

In 5.4.0, enhance large page support for recent SPARC platforms. 

Standard use of large pages in MySQL attempts to use the largest size 
supported, up to 4MB. Under Solaris, a “super large pages” feature will
enable uses of pages up to 256MB. This feature is enabled by default on 
Solaris. It can be enabled or disabled explicitly by using the 
--super-large-pages or --skip-super-large-pages options.

Add a new option:
* --super-large-pages: Boolean option. 
Large page support is enhanced for recent SPARC platforms. Standard use of 
large pages in MySQL attempts to use the largest size supported, up to 4MB. 
Under Solaris, a “super large pages” feature enables uses of pages up to 
256MB. This feature is enabled by default on Solaris. It can be enabled 
or disabled explicitly by using the --super-large-pages or
--skip-super-large-pages option. 

Update existing option:
* --large-pages: Enable by default.

Small patch; LLD not required.