Update Go version build tags

None of the dependencies have changed in 1.15. It may be possible to simplify
some of the wrappers in rawfile following 1.13, but that can come in a later
change.

PiperOrigin-RevId: 313863264

pkg/procid/procid_amd64.s

@@ -14,7 +14,7 @@
 
 // +build amd64
 // +build go1.8
-// +build !go1.15
+// +build !go1.16
 
 #include "textflag.h"
 

pkg/procid/procid_arm64.s

@@ -14,7 +14,7 @@
 
 // +build arm64
 // +build go1.8
-// +build !go1.15
+// +build !go1.16
 
 #include "textflag.h"
 

pkg/sentry/platform/kvm/bluepill_unsafe.go

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 // +build go1.12
-// +build !go1.15
+// +build !go1.16
 
 // Check go:linkname function signatures when updating Go version.
 

pkg/sentry/platform/kvm/machine_unsafe.go

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 // +build go1.12
-// +build !go1.15
+// +build !go1.16
 
 // Check go:linkname function signatures when updating Go version.
 

pkg/sentry/platform/ptrace/subprocess_unsafe.go

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 // +build go1.12
-// +build !go1.15
+// +build !go1.16
 
 // Check go:linkname function signatures when updating Go version.
 

pkg/sentry/vfs/mount_unsafe.go

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 // +build go1.12
-// +build !go1.15
+// +build !go1.16
 
 // Check go:linkname function signatures when updating Go version.
 

pkg/sleep/sleep_unsafe.go

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 // +build go1.11
-// +build !go1.15
+// +build !go1.16
 
 // Check go:linkname function signatures when updating Go version.
 

pkg/sync/memmove_unsafe.go

@@ -4,7 +4,7 @@
 // license that can be found in the LICENSE file.
 
 // +build go1.12
-// +build !go1.15
+// +build !go1.16
 
 // Check go:linkname function signatures when updating Go version.
 

pkg/sync/mutex_unsafe.go

@@ -4,7 +4,7 @@
 // license that can be found in the LICENSE file.
 
 // +build go1.13
-// +build !go1.15
+// +build !go1.16
 
 // When updating the build constraint (above), check that syncMutex matches the
 // standard library sync.Mutex definition.

pkg/sync/rwmutex_unsafe.go

@@ -4,7 +4,7 @@
 // license that can be found in the LICENSE file.
 
 // +build go1.13
-// +build !go1.15
+// +build !go1.16
 
 // Check go:linkname function signatures when updating Go version.
 

pkg/syncevent/waiter_unsafe.go

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 // +build go1.11
-// +build !go1.15
+// +build !go1.16
 
 // Check go:linkname function signatures when updating Go version.
 

pkg/tcpip/link/rawfile/blockingpoll_yield_unsafe.go

@@ -14,7 +14,7 @@
 
 // +build linux,amd64 linux,arm64
 // +build go1.12
-// +build !go1.15
+// +build !go1.16
 
 // Check go:linkname function signatures when updating Go version.
 

pkg/tcpip/time_unsafe.go

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 // +build go1.9
-// +build !go1.15
+// +build !go1.16
 
 // Check go:linkname function signatures when updating Go version.