Revert "Remove stale recipe changelog. (flutter-team-archive#15985)"

This reverts commit 6787207.

Author: NoamDev

recipe_changelog.md

@@ -0,0 +1,37 @@
+# Recipe Changelog
+
+## 31 Oct 2019
+
+* Recipe Link: https://chromium-review.googlesource.com/c/chromium/tools/build/+/1894232
+* Reason: Upload `sky_engine` to CIPD.
+
+## 30 Oct 2019
+
+* Recipe Link: https://chromium-review.googlesource.com/c/chromium/tools/build/+/1891522
+* Reason: Pass the `out-dir` arg in the recipe.
+
+## 29 Oct 2019
+
+* Recipe Link: https://chromium-review.googlesource.com/c/chromium/tools/build/+/1887742
+* Reason: Start uploading Fuchsia debug symbols to CIPD.
+
+## 28 Oct 2019
+
+* Recipe Link: https://chromium-review.googlesource.com/c/chromium/tools/build/+/1885414
+* Reason: We were not uploading dart_aot_runner artifacts.
+
+### 23 Oct 2019
+
+* Recipe Link: https://chromium-review.googlesource.com/c/chromium/tools/build/+/1877152
+* Reason: Clobber the cache directory after each build to clean-up outdated
+    artifacts.
+
+### 23 Oct 2019
+
+* Recipe Link: https://chromium-review.googlesource.com/c/chromium/tools/build/+/1875314
+* Reason: Using `unopt` flutter_tester is slower than the optimized alternative.
+
+### 21 Oct 2019
+
+* Recipe Link: https://chromium-review.googlesource.com/c/chromium/tools/build/+/1872832
+* Reason: `dart:kernel_compiler` is no longer a valid target after https://github.com/flutter/engine/pull/13158. This change is to account for that.