[tools] Add dylib files into the list of libraries on Mac

TBR=machenbach@chromium.org

Bug: v8:5918
Change-Id: I6fc16e3c6415246072b7626bdfd13ea0b7ce2dc2
Reviewed-on: https://chromium-review.googlesource.com/1189983
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55428}

tools/release/filter_build_files.py

@@ -35,7 +35,7 @@ SUPPLEMENTARY_FILES = [
 LIBRARY_FILES = {
   'android': ['*.a', '*.so'],
   'linux': ['*.a', '*.so'],
-  'mac': ['*.a', '*.so'],
+  'mac': ['*.a', '*.so', '*.dylib'],
   'win': ['*.lib', '*.dll'],
 }