Update Clang for rebase to r212749.
This also fixes a small issue with arm_neon.h not being generated always.
Includes a cherry-pick of:
r213450 - fixes mac-specific header issue
r213126 - removes a default -Bsymbolic on Android
Change-Id: I2a790a0f5d3b2aab11de596fc3a74e7cbc99081d
diff --git a/README.txt b/README.txt
index 44ce723..474c67c 100644
--- a/README.txt
+++ b/README.txt
@@ -8,7 +8,7 @@
Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
-different source level tools. One example of this is the Clang Static Analyzer.
+different source-level tools. One example of this is the Clang Static Analyzer.
If you're interested in more (including how to build Clang) it is best to read
the relevant web sites. Here are some pointers: