build: pass explicitly --changelog to write_version_header.py

This will be needed for SoonG genrule sandboxing.
See aosp/1501004.

Test: m trace_processor_shell
Change-Id: If27f16b92e8acba3f472d024ff2b22ba3b04acb7
diff --git a/Android.bp b/Android.bp
index ba600ad..3f1cd6e 100644
--- a/Android.bp
+++ b/Android.bp
@@ -6274,7 +6274,7 @@
   srcs: [
     "CHANGELOG",
   ],
-  cmd: "python3 $(location tools/write_version_header.py) --no_git --cpp_out=$(out)",
+  cmd: "python3 $(location tools/write_version_header.py) --no_git --changelog=$(location CHANGELOG) --cpp_out=$(out)",
   out: [
     "perfetto_version.gen.h",
   ],