package/guile: needs libtool

guile build-depends on libtool, but forgot to select it Kconfig.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
bdwgc: add patch automatically detecting for NO_GETCONTEXT need

This patch is necessary to successfully build guile with toolchain
missing support for getcontext.

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
[yann.morin.1998@free.fr: add a comment, change variable name, use
 AS_IF, remove debug traces, use AC_CHECK_FUNCS (Thomas)]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Makefile: clarify comment on .br-external handling

The comment language may lead the reader to think that .br-external is removed
whenever BR2_EXTERNAL is not set in the command line. Make it clear that
BR2_EXTERNAL must be explicitly set to an empty value for .br-external to get
removed.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
package/ntp: fix installation

Since 5d5c9a8 (ntp: security bump to version 4.2.8), scripts/ntp-wait
and scripts/ntptrace are no longer scripts themselves, but directories
containing those scripts.

Fixes:
    http://autobuild.buildroot.org/results/518/5189e84004bf28b891da3ee07fecc8717b4e8e8c/ (ntp-wait)
    http://autobuild.buildroot.org/results/005/0056192a06d44814a0279637c4bcbf602936e7ff/ (ntptrace)
    http://autobuild.buildroot.org/results/8f3/8f372acf73743edf8027cda6865ba1aa7b6413a3/ (both)
    ...

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
package/f2fs-tools: furthe endianness fixes

Add appropriate checks in configure.ac.

Fixes a slew of autobuilder failures:
    http://autobuild.buildroot.org/results/cf6/cf6f5b6981694f74bfca45b3d04ff35e4226b162/
    http://autobuild.buildroot.org/results/b34/b346472e686af5b517b689217349eab21878bb7b/
    http://autobuild.buildroot.org/results/49a/49a6a2a88cac6e0899f271a5e65c78dd9eb2eab4/
    ...

Note: patches sent upstream, awaiting for reply...

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
libxkbcommon: bump to version 0.5.0

Signed-off-by: Fatih Aşıcı <fatih.asici@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
qt5: remove hash file of the non-existing package

Added accidentally in 1e93aa4b9973c24cb16446b2373c222d512eb2e5.

Signed-off-by: Fatih Aşıcı <fatih.asici@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
libvncserver: bump version to 0.9.10

[Thomas:
 - add comment about AUTORECONF = YES, noticed by Baruch Siach, and
   suggested by Yann E. Morin.
 - add dependency on host-pkgconf, since the configure script uses
   PKG_CHECK_MODULES.]

Signed-off-by: Floris Bos <bos@je-eigen-domein.nl>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
util-linux: Add an option to compile 'nsenter' binary.

nsenter is a tool to enter the namespace of another process.

[Thomas: add dependency to 3.0 kernel headers, since the setns()
system call was added in Linux 3.0.]

Signed-off-by: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>