Remove or always use -xCC in Solaris C compiler options, be consistent

Occasionally the Windows builds fail because someone uses C++ style comments in C code
(// style vs. /* style */)

The Solaris compiler is given -xCC to allow this, but it might be better if some other platform
than Windows platforms had the same restriction.

Most C compilers accept // as a comment, but it technically is not part of the C89 C standard
and is easy to work around.

###@###.### 2005-03-17 04:11:54 GMT