arm: use the correct stat syscalls

src/pkg/syscall/syscall_linux_arm.go

Index: src/pkg/syscall/syscall_linux_arm.go
===================================================================
--- a/src/pkg/syscall/syscall_linux_arm.go
+++ b/src/pkg/syscall/syscall_linux_arm.go
@@ -36,15 +36,15 @@
 
 //sys	Chown(path string, uid int, gid int) (errno int)
 //sys	Fchown(fd int, uid int, gid int) (errno int)
-//sys	Fstat(fd int, stat *Stat_t) (errno int)
-//sys	Fstatfs(fd int, buf *Statfs_t) (errno int)
+//sys	Fstat(fd int, stat *Stat_t) (errno int) = SYS_FSTAT64
+//sys	Fstatfs(fd int, buf *Statfs_t) (errno int) = SYS_FSTATFS64
 //sys	Getegid() (egid int)
 //sys	Geteuid() (euid int)
 //sys	Getgid() (gid int)
 //sys	Getuid() (uid int)
 //sys	Lchown(path string, uid int, gid int) (errno int)
 //sys	Listen(s int, n int) (errno int)
-//sys	Lstat(path string, stat *Stat_t) (errno int)
+//sys	Lstat(path string, stat *Stat_t) (errno int) = SYS_LSTAT64
 //sys	Seek(fd int, offset int64, whence int) (off int64, errno int) = SYS_LSEEK
 //sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, errno int) = SYS__NEWSELECT
 //sys	Setfsgid(gid int) (errno int)
@@ -55,8 +55,8 @@
 //sys	Setresuid(ruid int, euid int, suid int) (errno int)
 //sys	Setreuid(ruid int, euid int) (errno int)
 //sys	Shutdown(fd int, how int) (errno int)
-//sys	Stat(path string, stat *Stat_t) (errno int)
-//sys	Statfs(path string, buf *Statfs_t) (errno int)
+//sys	Stat(path string, stat *Stat_t) (errno int) = SYS_STAT64
+//sys	Statfs(path string, buf *Statfs_t) (errno int) = SYS_STATFS64
 
 // TODO(kaib): add support for tracing
 func (r *PtraceRegs) PC() uint64 { return 0 }