Update buildroot & docker (#25)

* Update docker & buildroot

* Fix

* fix versions

buildroot/package/btrfs-progs/0003-btrfs.static-needs-libbtrfsutil.patch

@@ -0,0 +1,39 @@
+From 5023fdf9a4524106ef6fe1d0fdd75ade16dec62c Mon Sep 17 00:00:00 2001
+From: Baruch Siach <baruch@tkos.co.il>
+Date: Tue, 10 Apr 2018 22:56:31 +0300
+Subject: [PATCH] btrfs.static: needs libbtrfsutil
+
+Add libbtrfsutil objects to btrfs.static link command. This fixes static
+build failure:
+
+utils.static.o: In function `parse_qgroupid':
+utils.c:(.text.parse_qgroupid+0xb0): undefined reference to `btrfs_util_is_subvolume'
+props.static.o: In function `prop_read_only':
+props.c:(.text.prop_read_only+0x70): undefined reference to `btrfs_util_set_subvolume_read_only'
+...
+Makefile:457: recipe for target 'btrfs.static' failed
+make[1]: *** [btrfs.static] Error 1
+
+Signed-off-by: Baruch Siach <baruch@tkos.co.il>
+---
+Upstream status: https://patchwork.kernel.org/patch/10333795/
+
+ Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Makefile b/Makefile
+index 5ba76d2eee40..9b97c36a44a5 100644
+--- a/Makefile
++++ b/Makefile
+@@ -453,7 +453,7 @@ btrfs: btrfs.o $(objects) $(cmds_objects) $(libs_static)
+ 	@echo "    [LD]     $@"
+ 	$(Q)$(CC) -o $@ $^ $(LDFLAGS) $(LIBS) $(LIBS_COMP)
+ 
+-btrfs.static: btrfs.static.o $(static_objects) $(static_cmds_objects) $(static_libbtrfs_objects)
++btrfs.static: btrfs.static.o $(static_objects) $(static_cmds_objects) $(static_libbtrfs_objects) $(libbtrfsutil_objects)
+ 	@echo "    [LD]     $@"
+ 	$(Q)$(CC) -o $@ $^ $(STATIC_LDFLAGS) $(STATIC_LIBS) $(STATIC_LIBS_COMP)
+ 
+-- 
+2.16.3
+