obfs4proxy incompatibility on Android Q

We received a report that obfs4proxy doesn't run on Android Q due to a run-time linker error.

WARN: Managed proxy at '/data/app/org.torproject.torbrowser-xxxxxxxx==/lib/arm64/libObfs4proxy.so' reported: error: "/data/app/org.torproject.torbrowser-xxxxxxxx==/lib/arm64/libObfs4proxy.so": executable's TLS segment is underaligned: alignment is 8, needs to be at least 64 for ARM64 Bionic

This is a bug that was fixed in Golang 1.13

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