build: use subprocess.check_output to parse rev
authorAndrew Chadwick <andrewc-git@piffle.org>
Sun, 9 Mar 2014 23:47:42 +0000 (23:47 +0000)
committerAndrew Chadwick <andrewc-git@piffle.org>
Sun, 9 Mar 2014 23:47:42 +0000 (23:47 +0000)
commit77749db676222c44f089e1c2050a2055a9c742ad
treea07bada1a9b77221a63672741093e5109002995d
parent9f7e179a5cb2244be8851526e52d1e0486840dc9
build: use subprocess.check_output to parse rev

For some reason this part of the build commonly causes spurious errors on
Gentoo systems. Let's modernize the call a bit and see if that fixes the
issue.

https://gna.org/bugs/?20740
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