vendor: update go-runc to reduce gc pressure

[stevvooe]

Signed-off-by: Stephen J Day stephen.day@docker.com

[codecov-io]

Codecov Report

Merging #2059 into master will decrease coverage by 4.92%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2059      +/-   ##
==========================================
- Coverage   50.35%   45.43%   -4.93%     
==========================================
  Files          84       96      +12     
  Lines        7393     9429    +2036     
==========================================
+ Hits         3723     4284     +561     
- Misses       2964     4435    +1471     
- Partials      706      710       +4

Flag	Coverage Δ
#linux	50.35% <ø> (ø)	⬆️
#windows	40.31% <ø> (?)

Impacted Files	Coverage Δ
fs/path.go	60.69% <0%> (-12.56%)	⬇️
oci/spec.go	40% <0%> (-10%)	⬇️
snapshots/naive/naive.go	43.89% <0%> (-10%)	⬇️
metadata/snapshot.go	45.95% <0%> (-8.96%)	⬇️
archive/compression/compression.go	43.93% <0%> (-8.9%)	⬇️
remotes/docker/fetcher.go	41.42% <0%> (-7.6%)	⬇️
content/local/writer.go	52.63% <0%> (-7.37%)	⬇️
fs/copy.go	34.83% <0%> (-7.2%)	⬇️
archive/tar.go	43.25% <0%> (-6.9%)	⬇️
metadata/containers.go	47.31% <0%> (-6.4%)	⬇️
... and 61 more

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[crosbymichael]

LGTM