[Merge] lp:~jamesodhunt/upstart/bug-1302117 into lp:upstart

[Dimitri John Ledkov]

Strangely this generates empty multi-line test.log for
TEST_FEATURE ("with exec call by process after fork");

But the test doesn't expect any output (all it execs is /bin/true)
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https://code.launchpad.net/~jamesodhunt/upstart/bug-1302117/+merge/215173
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