iptables: version bumped to 1.4.21.
gcc: Sane defaults when optimization.* file doesn't exist

This also allow us to fiddle less with our iso build tools
everytime the compiler etc is bumped.

Yes, we default to i686 or x86-64 for the CPU, since that's what
we use iwhen building the ISO.
binutils: Sane optimization defaults for the menu
ccache: enable ccache default
optimization-plugins: moved the defaults variables

Moved the defaults for the menus to conform with the rest of the code
plugins: added functions setting the defaults for gcc and binutils
Merge branch 'optimization_defaults'
check: version bumped to 0.9.11.
libpcap: version bumped to 1.5.1.
Python: version bumped to 2.7.6.
lftp: version bumped to 4.4.13.
file: version bumped to 5.16.
binutils: version bumped to 2.24.
Merge branch 'check'
Merge branch 'cap'
linux: version bumped to 3.12.3.
bison: version bumped to 3.0.2.
Merge pull request #513 from Florin65/ip

iptables: version bumped to 1.4.21.
Merge pull request #519 from Florin65/ftp

lftp: version bumped to 4.4.13.
Merge pull request #521 from Florin65/file

file: version bumped to 5.16.