Fixes for building on Fedora 26 (Alpha)

As Fedora 26 has a new gcc [1] and a new system pkg-config implementation [2] I wanted to do some testing on that host OS so that we might be able to get some fixes in before Pyro/2.3 is released.

The following series were the only changes required to start building (I have tested core-image-minimal, core-image-base and core-image-sato) on Fedora 26.

1. https://fedoraproject.org/wiki/Changes/GCC7
2. https://fedoraproject.org/wiki/Changes/pkgconf_as_system_pkg-config_implementation

The following changes since commit 633ad6c9f436f5d2b6ee1a005b697661a054a394:

oeqa/runtime/utils/targetbuildproject: use parent classes defaults tmpdir (2017-04-06 10:13:39 +0100)

are available in the git repository at:

git://git.yoctoproject.org/poky-contrib joshuagl/fedora26
http://git.yoctoproject.org/cgit.cgi/poky-contrib/log/?h=joshuagl/fedora26

Joshua Lock (2):
elfutils: fix building elfutils-native with GCC7 gcc-6.3: backport fix of check for empty string in ubsan.c

 .../elfutils-0.168/Fix_one_GCC7_warning.patch      | 44 ++++++++++++++++++++++
 .../elfutils/elfutils-0.168/fallthrough.patch      | 36 ++++++++++++++++++
 meta/recipes-devtools/elfutils/elfutils_0.168.bb   |  3 ++
 meta/recipes-devtools/gcc/gcc-6.3.inc              |  1 +
 .../gcc/gcc-6.3/ubsan-fix-check-empty-string.patch | 28 ++++++++++++++
 5 files changed, 112 insertions(+)
 create mode 100644 meta/recipes-devtools/elfutils/elfutils-0.168/Fix_one_GCC7_warning.patch
 create mode 100644 meta/recipes-devtools/elfutils/elfutils-0.168/fallthrough.patch
 create mode 100644 meta/recipes-devtools/gcc/gcc-6.3/ubsan-fix-check-empty-string.patch

2.9.3