I'm finding that on my laptop the cmd/go tests sometimes time out when
the laptop is heavily loaded because I'm running all the tests in
parallel.  The cmd/go tests are really a whole testsuite, not a single
test.  So bumping the timeout.  Bootstrapped and ran Go testsuite on
x86_64-pc-linux-gnu.  Committed to mainline.

Ian


2018-02-09  Ian Lance Taylor  <iant@golang.org>

* Makefile.am (GOTOOLS_TEST_TIMEOUT): Double value.