[PATCH] [libcxx] Update libc++ docs to include instructions for LIT.

[Ed Maste]

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Comment at: www/index.html:114
@@ +113,3 @@
+  <ul>
+    <li>Mac OS X i386</li>
+    <li>Mac OS X x86_64</li>
----------------
Also:
<li>FreeBSD 10+ i386</li>
<li>FreeBSD 10+ amd64</li>
<li>FreeBSD 10+ arm</li>

I could add these in a separate commit.

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Comment at: www/index.html:161
@@ -151,2 +160,3 @@
   <p>
-     Next:
+    The following instructions are for building libc++ on Mac or Linux using
+    <a href="http://libcxxabi.llvm.org/">libc++abi</a> as the C++ ABI library.
----------------
on FreeBSD, Linux, or Mac

tests have some issues on FreeBSD at the moment

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Comment at: www/index.html:251
@@ -171,3 +250,3 @@
 
   <ul>
     <li><code>clang++ -stdlib=libc++ test.cpp</code></li>
----------------
these instructions are valid for FreeBSD too

http://reviews.llvm.org/D4766