arch/avr32: Fix download of header files

This patch fixes the download of the avr32 headers in crosstool-ng by
fetching them directly from Atmel's web site instead of the now-broken URL
given by the original author of the avr32-header-fetching modification,
who fetched them from a copy on his own, now-defunct server.

It also adds the necessary logic to extract from a zip file, as that is
how the headers are packaged.

To configure it for avr32 after launching ct-ng menuconfig in an empty
directory:

Paths and misc options ->
Shell to use as CONFIG_SHELL = sh
Target options ->
Target Architecture = avr32
Toolchain options ->
Tuple's alias = avr32
Binary utilities ->
binutils version = 2.18a
C compiler
gcc version = 4.2.2
C-library
newlib version = 1.17.0
Enable IOs on long long = yes
Enable IOs on floats and doubles = yes
Disable the syscalls supplied with newlib = yes

CONFIG_SHELL is necessary to get round the "fragment: command not
found" bug when binutils-2.18 is configured using bash.

Prepared against crosstool-ng mercurial trunk on 31 March 2012.

Signed-off-by: Martin Guy <martinwguy@gmail.com>
[yann.morin.1998@free.fr: update bundles sample accordingly]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Message-Id: <CAL4-wQrg_NQ7jm-NCADqeyQr9twyhtx42OUGNThP6gWeqZc=kw@mail.gmail.com>
Patchwork-Id: 232612

 # Wrapper to build the companion libs facilities

 # List all companion tools facilities, and parse their scripts

 CT_COMP_LIBS_FACILITY_LIST=

 for f in "${CT_LIB_DIR}/scripts/build/companion_libs/"*.sh; do

     _f="$(basename "${f}" .sh)"

     _f="${_f#???-}"

     . "${f}"

     CT_COMP_LIBS_FACILITY_LIST="${CT_COMP_LIBS_FACILITY_LIST} ${_f}"

 done

 # Download the companion libs facilities

 do_companion_libs_get() {

     for f in ${CT_COMP_LIBS_FACILITY_LIST}; do

         do_${f}_get

     done

 }

 # Extract and patch the companion libs facilities

 do_companion_libs_extract() {

     for f in ${CT_COMP_LIBS_FACILITY_LIST}; do

         do_${f}_extract

     done

 }

 # Build the companion libs facilities for build

 do_companion_libs_for_build() {

     for f in ${CT_COMP_LIBS_FACILITY_LIST}; do

         do_${f}_for_build

     done

 }

 # Build the companion libs facilities for host

 do_companion_libs_for_host() {

     for f in ${CT_COMP_LIBS_FACILITY_LIST}; do

         do_${f}_for_host

     done

 }