2017: added "Exporting Go" talk (GopherCon Singapore)

Change-Id: I47b8ec153640f609014daa683cf8640f09232b3e
Reviewed-on: https://go-review.googlesource.com/44891
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/2017/exporting-go.pdf b/2017/exporting-go.pdf
new file mode 100644
index 0000000..febdd81
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