Add exif-stripper to all-repos.yaml

Author: stefmolin

all-repos.yaml

@@ -245,3 +245,4 @@
 - https://github.com/hakancelikdev/unimport
 - https://github.com/hakancelikdev/unexport
 - https://github.com/KindDragon/gn-build-py
+- https://github.com/stefmolin/exif-stripper