Update gopsutil to v2.19.05

gopsutil was updated via `go get github.com/shirou/[email protected]`.
Unfortunately the tagging strategy is incompatible with go modules.

spire only depends on the process package of gopsutil. This package has the following
notable changes since v2.18.12:
- Dependency on sed and awk binaries removed from darwin.
- Dependency from process package -> host package has been removed on linux.

Signed-off-by: Tyler Dixon <[email protected]>

go.mod

@@ -20,7 +20,6 @@ require (
  github.com/docker/go-units v0.3.3 // indirect
  github.com/envoyproxy/go-control-plane v0.6.9
  github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5 // indirect
- github.com/go-ole/go-ole v1.2.1 // indirect
  github.com/go-sql-driver/mysql v1.4.1
  github.com/gofrs/uuid v3.2.0+incompatible
  github.com/gogo/googleapis v1.1.0
@@ -57,8 +56,7 @@ require (
  github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c // indirect
  github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
  github.com/prometheus/client_golang v0.9.3-0.20190127221311-3c4408c8b829
- github.com/shirou/gopsutil v2.18.12+incompatible
- github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4 // indirect
+ github.com/shirou/gopsutil v0.0.0-20190601025009-5335e3fd506d
  github.com/sirupsen/logrus v1.4.0
  github.com/spf13/pflag v1.0.3 // indirect
  github.com/spiffe/go-spiffe v0.0.0-20181210192309-b261e4202fec

go.sum

@@ -16,6 +16,7 @@ github.com/DataDog/datadog-go v0.0.0-20190321161819-752af9db25a0 h1:bD7kotLFsrIC
 github.com/DataDog/datadog-go v0.0.0-20190321161819-752af9db25a0/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
 github.com/Microsoft/go-winio v0.4.12 h1:xAfWHN1IrQ0NJ9TBC0KBZoqLjzDTr1ML+4MywiUOryc=
 github.com/Microsoft/go-winio v0.4.12/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
+github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
 github.com/StackExchange/wmi v0.0.0-20181212234831-e0a55b97c705 h1:UUppSQnhf4Yc6xGxSkoQpPhb7RVzuv5Nb1mwJ5VId9s=
 github.com/StackExchange/wmi v0.0.0-20181212234831-e0a55b97c705/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
@@ -201,6 +202,8 @@ github.com/prometheus/procfs v0.0.0-20180725123919-05ee40e3a273/go.mod h1:c3At6R
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.0-20190117184657-bf6a532e95b1 h1:/K3IL0Z1quvmJ7X0A1AwNEK7CRkVK3YwfOU/QAL4WGg=
 github.com/prometheus/procfs v0.0.0-20190117184657-bf6a532e95b1/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
+github.com/shirou/gopsutil v0.0.0-20190601025009-5335e3fd506d h1:bl6/7EtV2KhriQzX5gFDnYbvbcjs3H5g9Bzjf1RWvxI=
+github.com/shirou/gopsutil v0.0.0-20190601025009-5335e3fd506d/go.mod h1:WWnYX4lzhCH5h/3YBfyVA3VbLYjlMZZAQcW9ojMexNc=
 github.com/shirou/gopsutil v2.18.12+incompatible h1:1eaJvGomDnH74/5cF4CTmTbLHAriGFsTZppLXDX93OM=
 github.com/shirou/gopsutil v2.18.12+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
 github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4 h1:udFKJ0aHUL60LboW/A+DfgoHVedieIzIXE8uylPue0U=