update openlibm website.

Author: ViralBShah

docs/index.html

@@ -55,10 +55,10 @@ <h3>
 <h3>
 <a id="platform-support" class="anchor" href="#platform-support" aria-hidden="true"><span class="octicon octicon-link"></span></a>Platform support</h3>
 
-<p>OpenLibm builds on Linux, Mac OS X, Windows, FreeBSD, and
-  OpenBSD. It builds with both GCC and clang. Although largely tested
-  and widely used on the x86 and x86-64 architectures, OpenLibm also
-  supports arm, aarch64, ppc64le, and mips.
+<p>OpenLibm builds on Linux, macOS, Windows, FreeBSD, OpenBSD, NetBSD, and
+DragonFly BSD.  It builds with both GCC and clang. Although largely
+tested and widely used on the x86 and x86-64 architectures, OpenLibm
+also supports arm, aarch64, ppc64le, mips, wasm32, and s390(x).
 
 <h3>
 <a id="other-relevant-projects" class="anchor" href="#other-relevant-projects" aria-hidden="true"><span class="octicon octicon-link"></span></a>Other relevant projects</h3>