The html man page builder creates a web page for every
man page generated by our releases. We then check all
those pages into the ompi-www repo. Force the build
to skip case-conflicting pages (ie, mpiCC because it
conflicts with mpicc), even if building on Linux, so that
ompi-www continues to be sane when cloned onto MacOS.
Signed-off-by: Brian Barrett <bbarrett@amazon.com>