BaseTools: Update Brotli Compress to the latest one 1.0.6

https://bugzilla.tianocore.org/show_bug.cgi?id=1201
Update Brotli to the latest version 1.0.6
https://github.com/google/brotli
Verify VS2017, GCC5 build.
Verify Decompression boot functionality.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>

BaseTools/Source/C/BrotliCompress/enc/cluster_inc.h

@@ -17,6 +17,8 @@ BROTLI_INTERNAL void FN(BrotliCompareAndPushToQueue)(
     size_t* num_pairs) CODE({
   BROTLI_BOOL is_good_pair = BROTLI_FALSE;
   HistogramPair p;
+  p.idx1 = p.idx2 = 0;
+  p.cost_diff = p.cost_combo = 0;
   if (idx1 == idx2) {
     return;
   }