system: add option to install additional init scripts

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
system/skeleton: fixup /etc/fstab

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
system: add option to load specific kernel modules during startup

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
rp-pppoe: install sysv startup script

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
rpi-pwrbtn: new package

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
skeleton: check each return status from modprobe in S02modules
cups: install sysv startup script
rpi-userland: remove execute bit from S94vcfiled
board/ryco/configs: add raspberry pi project configs

Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
package/nettle: fix shared-only build

Changeset f1d3e09 (Build shared libraries only as the default) broke the
nettle package.

nettle really wants to statically link its tools, examples and testsuite
against its own libraries. But for a shared-only build, static libraries
are not even built, so the build breaks when trying to link any of them.

Fix that in two ways:

  - the proper way, by using whatever libraries are available, with a
    preference toward using shared libraries;

  - disabling both examples and testsuite since we do not need them.

Fixes numerous build failures:
    http://autobuild.buildroot.net/results/e93/e93da743c5b84b1bb6274aeee3fe3b52962c560c/
    http://autobuild.buildroot.net/results/51d/51d0138ff39c45603315dcedf1f654c18604e1a8/
    http://autobuild.buildroot.net/results/521/521d979658e402103f1a18fcfeab3f9705f0c000/
    ...

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Peter Korsgaard <jacmet@uclibc.org>