xz: support concatenated .xz streams

function                                             old     new   delta
xz_dec_reset                                           -      77     +77
unpack_xz_stream                                    2402    2397      -5

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
volume_id: fix ntfs attribute search

len is declared as uint32_t but le16_to_cpu macro is used

Signed-off-by: Oliver Metz <oliver.metz@gmx.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

Change-Id: Ibc342fcf970d98003fac15c7008b87622e38647f
Apply post-1.21.0 patches, bump version to 1.21.1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

update config for 1.21.1
Signed-off-by: Tanguy Pruvot <tanguy.pruvot@gmail.com>

Change-Id: Ibfd9124cbc9be744709dfe07a1a5b30df545e806
Fix syscalls on 4.3's bionic

Change-Id: Ibaeaa30ce88880338cd0236791f7db4cac8289b5
mktemp: switch to mkstemp

The compiler warning was breaking the build due to Werror, and it's
an easy fix

Change-Id: Ic109aa017c02596e9cf0aae3c6f82d72849b90cf