Bump buidlroot version to 2018.02.6

bsp/buildroot/package/popt/0004-popt.pc-add-the-libintl-library-to-the-Libs.private-.patch

@@ -1,47 +0,0 @@
-From 470755ccc353b59107c957972d908cbde4942c8d Mon Sep 17 00:00:00 2001
-From: Fabio Porcedda <fabio.porcedda@gmail.com>
-Date: Sun, 1 Mar 2015 21:13:48 +0100
-Subject: [PATCH] popt.pc: add the libintl library to the Libs.private field
-
-If static linking and libintl is used, the program that uses the popt
-library needs to link to the libintl library too so add the libintl
-library to the libs.private field because is useful for programs that call
-  pkg-config --static --libs popt
-they get the libintl library too:
-  -L<...> -lpopt -lintl
-
-This patch was already sent upstream:
-http://rpm5.org/community/popt-devel/0294.html
-
-Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
----
- configure.ac | 1 +
- popt.pc.in   | 1 +
- 2 files changed, 2 insertions(+)
-
-diff --git a/configure.ac b/configure.ac
-index e8eb238..816d272 100644
---- a/configure.ac
-+++ b/configure.ac
-@@ -90,6 +90,7 @@ popt_sysconfdir="${sysconfdir}"
- eval "popt_sysconfdir=\"${popt_sysconfdir}\"" # expand contained ${prefix}
- AC_DEFINE_UNQUOTED([POPT_SYSCONFDIR], ["$popt_sysconfdir"], [Full path to default POPT configuration directory])
- 
-+AC_SUBST([POPT_PKGCONFIG_LIBS_PRIVATE],"$LIBINTL")
- 
- # Define a (hope) portable Libs pkgconfig directive that 
- # - Don't harm if the default library search path include ${libdir}
-diff --git a/popt.pc.in b/popt.pc.in
-index a86437c..0acfdb9 100644
---- a/popt.pc.in
-+++ b/popt.pc.in
-@@ -6,5 +6,6 @@ includedir=@includedir@
- Name: popt
- Version: @VERSION@
- Description: popt library.
-+Libs.private: @POPT_PKGCONFIG_LIBS_PRIVATE@
- Libs: @POPT_PKGCONFIG_LIBS@
- Cflags: -I${includedir}
--- 
-2.3.1
-

bsp/buildroot/package/popt/popt.mk

@@ -11,10 +11,7 @@ POPT_LICENSE = MIT
 POPT_LICENSE_FILES = COPYING
 POPT_AUTORECONF = YES
 POPT_GETTEXTIZE = YES
-
-ifeq ($(BR2_PACKAGE_GETTEXT),y)
-POPT_DEPENDENCIES += gettext
-endif
+POPT_DEPENDENCIES = $(TARGET_NLS_DEPENDENCIES)
 
 POPT_CONF_ENV = ac_cv_va_copy=yes