Add the brotli compressor for bsdiff

Add a new compressor interface; and the brotli compressor which is
similar to the existing bz2 one.

Also add a new CompressorType argument to PatchWriter's init function;
this allows us to choose the right compressor based on the input option
in the future.

Bug: 34220646
Test:  Run bsdiff/bspatch with brotli compressor/decompressor over a
list of files from angler's system image. Make succeeds.
Change-Id: Id9a3db2d7d051dcb751a1fc362f4c3b9226e878b

1 files changed, 1 insertions, 1 deletions

diff --git a/bsdiff.cc b/bsdiff.cc
index 01cd721..e5d1e7c 100644
--- a/bsdiff.cc
+++ b/bsdiff.cc
@@ -49,7 +49,7 @@ namespace bsdiff {
 int bsdiff(const uint8_t* old_buf, size_t oldsize, const uint8_t* new_buf,
            size_t newsize, const char* patch_filename,
            SuffixArrayIndexInterface** sai_cache) {
-	BsdiffPatchWriter patch(patch_filename);
+	BsdiffPatchWriter patch(patch_filename, CompressorType::kBZ2);
 	return bsdiff(old_buf, oldsize, new_buf, newsize, &patch, sai_cache);
 }