Update buildroot & docker (#25)

* Update docker & buildroot

* Fix

* fix versions

buildroot/package/gawk/0001-no-versioned.patch

@@ -1,5 +1,4 @@
 Disabled versioned installation of binaries to save space.
-Also use symlinks where it's appropiate.
 
 Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
 [Gustavo: update for 4.1.2]
@@ -7,15 +6,6 @@ Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
 diff -Nura gawk-4.1.2.orig/Makefile.in gawk-4.1.2/Makefile.in
 --- gawk-4.1.2.orig/Makefile.in	2015-04-29 16:11:09.367925925 -0300
 +++ gawk-4.1.2/Makefile.in	2015-04-29 16:11:25.308466495 -0300
-@@ -554,7 +554,7 @@
- CLEANFILES = core core.*
- 
- # We want hard links for install-exec-hook, below
--LN = ln
-+LN = $(LN_S)
- 
- # For some make's, e.g. OpenBSD, that don't define this
- RM = rm -f
 @@ -1173,6 +1173,7 @@
  # (This is done universally, which may not always be right, but
  # there's no easy way to distinguish GNU from non-GNU systems.)