We don't use the TLS section on android, and dropping it avoids
complaints about underalignment from the Android Q linker.

Updates #29674

Change-Id: I91dabf2a58e6eb1783872639a6a144858db09cef
Reviewed-on: https://go-review.googlesource.com/c/go/+/169618Reviewed-by: Ian Lance Taylor <iant@golang.org>