unxz: new applet, complete with xzcat and xz -d aliases

function                                             old     new   delta
unpack_xz_stream_stdin                                 -    3953   +3953
lzma_main                                              -    2601   +2601
lzma_len                                               -     516    +516
dec_vli                                                -     165    +165
dict_repeat                                            -     103    +103
lzma_reset                                             -      98     +98
fill_temp                                              -      98     +98
crc32_validate                                         -      93     +93
xz_dec_reset                                           -      77     +77
unxz_main                                              -      77     +77
index_update                                           -      47     +47
xz_crc32                                               -      40     +40
packed_usage                                       27044   27060     +16
make_new_name_unxz                                     -      14     +14
applet_names                                        2240    2254     +14
applet_main                                         1312    1324     +12
applet_nameofs                                       656     662      +6
unpack_unxz                                            -       5      +5
send_tree                                            355     360      +5
applet_install_loc                                   164     166      +2
------------------------------------------------------------------------------
(add/remove: 15/0 grow/shrink: 6/0 up/down: 7942/0)          Total: 7942 bytes
   text    data     bss     dec     hex filename
 844032     453    6812  851297   cfd61 busybox_old
 852063     453    6812  859328   d1cc0 busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/archival/Kbuild b/archival/Kbuild
index 53bd7e2..3300ea9 100644
--- a/archival/Kbuild
+++ b/archival/Kbuild
@@ -8,18 +8,21 @@
 
 lib-y:=
 lib-$(CONFIG_AR)		+= ar.o
-lib-$(CONFIG_BUNZIP2)		+= bbunzip.o
-lib-$(CONFIG_BZIP2)		+= bzip2.o bbunzip.o
-lib-$(CONFIG_UNLZMA)		+= bbunzip.o
 lib-$(CONFIG_CPIO)		+= cpio.o
 lib-$(CONFIG_DPKG)		+= dpkg.o
 lib-$(CONFIG_DPKG_DEB)		+= dpkg_deb.o
-lib-$(CONFIG_GUNZIP)		+= bbunzip.o
-lib-$(CONFIG_GZIP)		+= gzip.o bbunzip.o
-lib-$(CONFIG_LZOP)		+= lzop.o lzo1x_1.o lzo1x_1o.o lzo1x_d.o bbunzip.o
-lib-$(CONFIG_LZOP_COMPR_HIGH)	+= lzo1x_9x.o
 lib-$(CONFIG_RPM2CPIO)		+= rpm2cpio.o
 lib-$(CONFIG_RPM)		+= rpm.o
 lib-$(CONFIG_TAR)		+= tar.o
-lib-$(CONFIG_UNCOMPRESS)	+= bbunzip.o
 lib-$(CONFIG_UNZIP)		+= unzip.o
+
+lib-$(CONFIG_LZOP)		+= lzop.o lzo1x_1.o lzo1x_1o.o lzo1x_d.o bbunzip.o
+lib-$(CONFIG_LZOP_COMPR_HIGH)	+= lzo1x_9x.o
+lib-$(CONFIG_GZIP)		+= gzip.o bbunzip.o
+lib-$(CONFIG_BZIP2)		+= bzip2.o bbunzip.o
+
+lib-$(CONFIG_UNXZ)		+= bbunzip.o
+lib-$(CONFIG_UNLZMA)		+= bbunzip.o
+lib-$(CONFIG_BUNZIP2)		+= bbunzip.o
+lib-$(CONFIG_GUNZIP)		+= bbunzip.o
+lib-$(CONFIG_UNCOMPRESS)	+= bbunzip.o