media-libs/libexif: Fill in OWNERS

The only usage of libexif appears to be croscamera, so the OWNERS of
the latter are on the hook to maintain the package per Chrome OS
software maintenance conventions.

BUG=None
TEST=None

Change-Id: I25102d15ea504f0a9cc35ddea2a6740d9bd9f6b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2575068
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Ricky Liang <jcliang@chromium.org>
Commit-Queue: Mattias Nissler <mnissler@chromium.org>
Tested-by: Mattias Nissler <mnissler@chromium.org>
diff --git a/media-libs/libexif/OWNERS b/media-libs/libexif/OWNERS
new file mode 100644
index 0000000..8f44c3e
--- /dev/null
+++ b/media-libs/libexif/OWNERS
@@ -0,0 +1 @@
+include chromiumos/platform2:/camera/OWNERS