Elfdump: First commit

        Elfdump is a volatility plugin that is able to dump a dynamic linked elf file from a memory dump.
        Address Space Layout Randomization (ASLR) is not supported and has to be disabled.
        To execute the dumped elf is necessary to set the environment variable LD_BIND_NOW = 1,
        in order to force the dynamic linker to process all relocations before transferring control to the program.
        Section reconstruction is not implemented.
        Supported ELF 32-bit.

Signed-off-by: enrico canzonieri <enrico.canzonieri@eurecom.fr>