os: gofmt

As reported by John Papandriopoulos, some parts of CL 216622 weren't
properly formatted.

Change-Id: I3a76abb6213bb17ef440036295c86d930703b456
Reviewed-on: https://go-review.googlesource.com/c/go/+/269218
Run-TryBot: Tobias Klauser <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Alberto Donizetti <[email protected]>
Trust: Alberto Donizetti <[email protected]>
Trust: Tobias Klauser <[email protected]>

Author: tklauser

src/os/executable_dragonfly.go

@@ -6,7 +6,7 @@ package os
 
 // From DragonFly's <sys/sysctl.h>
 const (
-        _CTL_KERN           = 1
-        _KERN_PROC          = 14
-        _KERN_PROC_PATHNAME = 9
+	_CTL_KERN           = 1
+	_KERN_PROC          = 14
+	_KERN_PROC_PATHNAME = 9
 )

src/os/executable_freebsd.go

@@ -6,7 +6,7 @@ package os
 
 // From FreeBSD's <sys/sysctl.h>
 const (
-        _CTL_KERN           = 1
-        _KERN_PROC          = 14
-        _KERN_PROC_PATHNAME = 12
+	_CTL_KERN           = 1
+	_KERN_PROC          = 14
+	_KERN_PROC_PATHNAME = 12
 )