os/user: fix Solaris declaration.

    
    Patch from Rainer Orth.
    
    Reviewed-on: https://go-review.googlesource.com/25210

From-SVN: r238742

gcc/go/gofrontend/MERGE

-b156d71ad75a1b73d0ed805a5370a297648d9270
+ffd91f9f72fb93147d4ccce9e4c4a59e4c3c2e62
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/go/os/user/decls_solaris.go

@@ -21,4 +21,4 @@ func libc_getpwuid_r(uid syscall.Uid_t, pwd *syscall.Passwd, buf *byte, buflen s
 func libc_getgrnam_r(name *byte, grp *syscall.Group, buf *byte, buflen syscall.Size_t, result **syscall.Group) int
 
 //extern __posix_getgrgid_r
-func libc_getgrgid_r(gid syscall.Gid_t, grp *syscall.group, buf *byte, buflen syscall.Size_t, result **syscall.group) int
+func libc_getgrgid_r(gid syscall.Gid_t, grp *syscall.Group, buf *byte, buflen syscall.Size_t, result **syscall.Group) int