linux-yocto/3.14: introduce versioned recipes

The release kernel for Yocto 1.6 is the 3.14 kernel, so we introduce
the versioned recipes here.

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
linux-libc-headers: make compression format configurable

As of the 3.13 kernel bz2 compressed tarballs are not available. To support
older header tarballs, and newer ones that require the 'xz' compressed
bundles, we can break out a variable that allows versioned libc headers to
select the archive format that works.

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
linux-libc-headers: add 3.14 libc headers

Introduce the 3.14 linux-libc-headers recipe, now that the 3.14 kernel is
available, and the default for the qemu reference BSPs.

The three patches which were required for the previous 3.10 libc-headers
are not required for 3.14 and can be ignored.

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
libc-headers: set TC default to 3.14

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
linux-libc-headers: remove 3.10 recipe

3.14 is now the reference for libc-headers. After building and booting 3.x based
BSPs against the 3.14 headers, we can safely remove the old version and patches
that are now part of the mainline kernel.

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>