Added first builds for Xeon Phi Software.

List of added ebuilds:
- binutils
- gcc
- glibc
- gdb
- gen-symver-map
- mpss-headers
- libscif
- mpss-daemon

Building a cross compiler toolchain works with the committed ebuilds.
Added an ebuild for the kernel sources of the card's Linux kernel.
Added ebuild for prebuild Xeon Phi card kernel and rootfs.
Added ebuild for Xeon Phi kernel modules.
Added patch for k1om gcc to fix bug http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51969.