libgo patch committed: Update to Go1.16beta1 release

[Andreas Schwab]

../../../../libgo/go/golang.org/x/sys/cpu/cpu.go:200:9: error: reference to undefined name ‘initOptions’
  200 |         initOptions()
      |         ^
make[2]: *** [golang.org/x/sys/cpu.lo] Error 1

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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