Added patch for cryptsetup_1.7.1

[nickabal]

# Adding new keyslot, existing passphrase provided,new passphrase provided.
# action crypt_keyslot_add_by_passphrase CRYPT_ACTIVATE_NUKE.

# action crypt_keyslot_add_by_passphrase.

# Trying to open key slot 0 [ACTIVE_LAST].
# Reading key slot 0 area.
# Using userspace crypto wrapper to access keyslot area.
Key slot 0 unlocked.
# Calculating data for key slot 1
# KDF pbkdf2, hash sha1: 1339177 iterations per second (256-bits key).
# Key slot 1 use 2615580 password iterations.
# Using hash sha1 for AF in key slot 1, 4000 stripes
# Updating key slot 1 [0x21000] area.
# Using userspace crypto wrapper to access keyslot area.
# Key slot 1 was enabled in LUKS header.
# Updating LUKS header of size 1024 on device /dev/md127
# Key length 32, device size 7813533696 sectors, header size 2050 sectors.
# Reading LUKS header of size 1024 from device /dev/md127
# Key length 32, device size 7813533696 sectors, header size 2050 sectors.
# Releasing crypt device /dev/md127 context.
# Releasing device-mapper backend.
# Unlocking memory.
Command successful.

[nickabal]

`bash-4.3$ cd /tmp
bash-4.3$ git clone https://gitlab.com/cryptsetup/cryptsetup.git
Cloning into 'cryptsetup'...
remote: Counting objects: 7385, done.
remote: Compressing objects: 100% (2248/2248), done.
remote: Total 7385 (delta 5123), reused 7372 (delta 5117)
Receiving objects: 100% (7385/7385), 4.02 MiB | 3.39 MiB/s, done.
Resolving deltas: 100% (5123/5123), done.
Checking connectivity... done.
bash-4.3$ cd cryptsetup/
bash-4.3$ ls
ABOUT-NLS COPYING ChangeLog INSTALL NEWS README.md autogen.sh docs man po src
AUTHORS COPYING.LGPL FAQ Makefile.am README TODO configure.ac lib misc python tests
bash-4.3$ wget https://raw.githubusercontent.com/nickabal/cryptsetup-nuke-keys/9c554fbc30fae293c7e6b8a3ec580ed088947249/cryptsetup_1.7.1%2Bnuke_keys.diff
--2016-05-18 14:52:27-- https://raw.githubusercontent.com/nickabal/cryptsetup-nuke-keys/9c554fbc30fae293c7e6b8a3ec580ed088947249/cryptsetup_1.7.1%2Bnuke_keys.diff
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 23.235.47.133
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|23.235.47.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 4955 (4.8K) [text/plain]
Saving to: ‘cryptsetup_1.7.1+nuke_keys.diff’

cryptsetup_1.7.1+nuke_keys.d 100%[=============================================>] 4.84K --.-KB/s in 0s

2016-05-18 14:52:27 (196 MB/s) - ‘cryptsetup_1.7.1+nuke_keys.diff’ saved [4955/4955]

bash-4.3$ patch -p1 < cryptsetup_1.7.1+nuke_keys.diff
patching file lib/libcryptsetup.h
patching file lib/luks1/keymanage.c
patching file lib/setup.c
patching file src/cryptsetup.c
bash-4.3$ ls
ABOUT-NLS COPYING.LGPL INSTALL README autogen.sh docs misc src
AUTHORS ChangeLog Makefile.am README.md configure.ac lib po tests
COPYING FAQ NEWS TODO cryptsetup_1.7.1+nuke_keys.diff man python
bash-4.3$ ./autogen.sh
bash-4.3$ ./configure.sh
bash-4.3$ make
`