unix: add CLONE_NEWCGROUP for linux kernel >=4.6

Change-Id: I827a97ad2b43f9b33281d0da36fe4cfdf24b928f
Reviewed-on: https://go-review.googlesource.com/23965
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

unix/zerrors_linux_386.go

@@ -216,6 +216,7 @@ const (
 	CLONE_FILES                      = 0x400
 	CLONE_FS                         = 0x200
 	CLONE_IO                         = 0x80000000
+	CLONE_NEWCGROUP                  = 0x2000000
 	CLONE_NEWIPC                     = 0x8000000
 	CLONE_NEWNET                     = 0x40000000
 	CLONE_NEWNS                      = 0x20000

unix/zerrors_linux_amd64.go

@@ -216,6 +216,7 @@ const (
 	CLONE_FILES                      = 0x400
 	CLONE_FS                         = 0x200
 	CLONE_IO                         = 0x80000000
+	CLONE_NEWCGROUP                  = 0x2000000
 	CLONE_NEWIPC                     = 0x8000000
 	CLONE_NEWNET                     = 0x40000000
 	CLONE_NEWNS                      = 0x20000

unix/zerrors_linux_arm.go

@@ -212,6 +212,7 @@ const (
 	CLONE_FILES                      = 0x400
 	CLONE_FS                         = 0x200
 	CLONE_IO                         = 0x80000000
+	CLONE_NEWCGROUP                  = 0x2000000
 	CLONE_NEWIPC                     = 0x8000000
 	CLONE_NEWNET                     = 0x40000000
 	CLONE_NEWNS                      = 0x20000

unix/zerrors_linux_arm64.go

@@ -222,6 +222,7 @@ const (
 	CLONE_FILES                      = 0x400
 	CLONE_FS                         = 0x200
 	CLONE_IO                         = 0x80000000
+	CLONE_NEWCGROUP                  = 0x2000000
 	CLONE_NEWIPC                     = 0x8000000
 	CLONE_NEWNET                     = 0x40000000
 	CLONE_NEWNS                      = 0x20000

unix/zerrors_linux_mips64.go

@@ -221,6 +221,7 @@ const (
 	CLONE_FILES                      = 0x400
 	CLONE_FS                         = 0x200
 	CLONE_IO                         = 0x80000000
+	CLONE_NEWCGROUP                  = 0x2000000
 	CLONE_NEWIPC                     = 0x8000000
 	CLONE_NEWNET                     = 0x40000000
 	CLONE_NEWNS                      = 0x20000

unix/zerrors_linux_mips64le.go

@@ -221,6 +221,7 @@ const (
 	CLONE_FILES                      = 0x400
 	CLONE_FS                         = 0x200
 	CLONE_IO                         = 0x80000000
+	CLONE_NEWCGROUP                  = 0x2000000
 	CLONE_NEWIPC                     = 0x8000000
 	CLONE_NEWNET                     = 0x40000000
 	CLONE_NEWNS                      = 0x20000

unix/zerrors_linux_ppc64.go

@@ -223,6 +223,7 @@ const (
 	CLONE_FILES                      = 0x400
 	CLONE_FS                         = 0x200
 	CLONE_IO                         = 0x80000000
+	CLONE_NEWCGROUP                  = 0x2000000
 	CLONE_NEWIPC                     = 0x8000000
 	CLONE_NEWNET                     = 0x40000000
 	CLONE_NEWNS                      = 0x20000

unix/zerrors_linux_ppc64le.go

@@ -222,6 +222,7 @@ const (
 	CLONE_FILES                      = 0x400
 	CLONE_FS                         = 0x200
 	CLONE_IO                         = 0x80000000
+	CLONE_NEWCGROUP                  = 0x2000000
 	CLONE_NEWIPC                     = 0x8000000
 	CLONE_NEWNET                     = 0x40000000
 	CLONE_NEWNS                      = 0x20000