Merge brotli tag 'v1.0.1' into master.

The latest stable version of brotli is v1.0.1, which is also the "1.0"
version.

This CL updates the Android.bp to match the source location changes
(all C code is now under c/). It also renames the binary to "brotli" to
match upstream binary name.

Bug: 34220646
Test: mmma external/brotli -j5; run "brotli" command manually.

Change-Id: Ice1c49c20b62a09e6e4f64ca7b2e3c0a29cde570
diff --git a/README.version b/README.version
index ed6bd22..c99eb32 100644
--- a/README.version
+++ b/README.version
@@ -1,4 +1,4 @@
 URL: https://github.com/google/brotli.git
-Version: 46c1a881b41bb638c76247558aa04b1591af3aa7
+Version: 5b4769990dc14a2bd466d2599c946c5652cba4b2
 BugComponent: 119451
 Owners: enh, android-janitors