Attach prebuilt libraries to GitHub releases #737

Job	Run time
android_emulator	14m 20s
fetch_prebuilts / Compile SQLite	8m 32s
Test ios	25m 11s
Test macos	15m 19s
Test tvos	10m 22s
Test watchos	7m 13s
Test windows	3m 20s
Test ubuntu	2m 10s
	1h 26m 27s

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