Update pkg/xattr to handle EINTR on Linux

Updates restic#2659. This is one of the cases where the stdlib will not handle
EINTR for us, even with Go 1.16. That xattr calls are directly affected
can be seen in the report for issue restic#2968.

go.mod

@@ -26,7 +26,7 @@ require (
 	github.com/pkg/errors v0.9.1
 	github.com/pkg/profile v1.5.0
 	github.com/pkg/sftp v1.12.0
-	github.com/pkg/xattr v0.4.1
+	github.com/pkg/xattr v0.4.2
 	github.com/restic/chunker v0.4.0
 	github.com/satori/go.uuid v1.2.0 // indirect
 	github.com/smartystreets/assertions v1.2.0 // indirect
@@ -37,7 +37,7 @@ require (
 	golang.org/x/net v0.0.0-20200904194848-62affa334b73
 	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
 	golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208
-	golang.org/x/sys v0.0.0-20201007082116-8445cc04cbdf
+	golang.org/x/sys v0.0.0-20201101102859-da207088b7d1
 	golang.org/x/text v0.3.4
 	google.golang.org/api v0.32.0
 	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect

go.sum

@@ -224,8 +224,8 @@ github.com/pkg/profile v1.5.0 h1:042Buzk+NhDI+DeSAA62RwJL8VAuZUMQZUjCsRz1Mug=
 github.com/pkg/profile v1.5.0/go.mod h1:qBsxPvzyUincmltOk6iyRVxHYg4adc0OFOv72ZdLa18=
 github.com/pkg/sftp v1.12.0 h1:/f3b24xrDhkhddlaobPe2JgBqfdt+gC/NYl0QY9IOuI=
 github.com/pkg/sftp v1.12.0/go.mod h1:fUqqXB5vEgVCZ131L+9say31RAri6aF6KDViawhxKK8=
-github.com/pkg/xattr v0.4.1 h1:dhclzL6EqOXNaPDWqoeb9tIxATfBSmjqL0b4DpSjwRw=
-github.com/pkg/xattr v0.4.1/go.mod h1:W2cGD0TBEus7MkUgv0tNZ9JutLtVO3cXu+IBRuHqnFs=
+github.com/pkg/xattr v0.4.2 h1:fbVxr9lvkToTGgPljVszvFsOdcbSv5BmGABneyxRgZM=
+github.com/pkg/xattr v0.4.2/go.mod h1:sBD3RAqlr8Q+RC3FutZcikpT8nyDrIEEBw2J744gVWs=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
@@ -367,7 +367,6 @@ golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208 h1:qwRHBd0NqMbJxfbotnDhm2ByMI1Shq4Y6oRJo21SGJA=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20181021155630-eda9bb28ed51/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -399,8 +398,8 @@ golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200828194041-157a740278f4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20201007082116-8445cc04cbdf h1:AvBTl0xbF/KtHyvm61X4gSPF7/dKJ/xQqJwKr1Qu9no=
-golang.org/x/sys v0.0.0-20201007082116-8445cc04cbdf/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201101102859-da207088b7d1 h1:a/mKvvZr9Jcc8oKfcmgzyp7OwF73JPWsQLvH1z2Kxck=
+golang.org/x/sys v0.0.0-20201101102859-da207088b7d1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=