all: format code according to Go 1.19 rules

Go 1.19 started reformatting code in a way that makes it more obvious
how it will be rendered on pkg.go.dev. It gets it almost right, but not
entirely. Therefore, I had to modify some of the comments so that they
are formatted correctly.

src/syscall/proc_hosted.go

@@ -14,25 +14,31 @@ func Getpid() int  { return int(libc_getpid()) }
 func Getppid() int { return int(libc_getppid()) }
 
 // uid_t getuid(void)
+//
 //export getuid
 func libc_getuid() int32
 
 // gid_t getgid(void)
+//
 //export getgid
 func libc_getgid() int32
 
 // uid_t geteuid(void)
+//
 //export geteuid
 func libc_geteuid() int32
 
 // gid_t getegid(void)
+//
 //export getegid
 func libc_getegid() int32
 
 // gid_t getpid(void)
+//
 //export getpid
 func libc_getpid() int32
 
 // gid_t getppid(void)
+//
 //export getppid
 func libc_getppid() int32