Remove uitypes.h and just include stdint.h; all we need from it is
uint{8,16,32}_t.

Items in .data other than shuffle_mask are unused; delete them.
Delete the unused macro load_and_inc4.  Move shuffle_mask to .rodata.

Use PC-relative addressing to avoid runtime text relocations on i386.

Adapted patch from Nalin Dahyabhai.

ticket: 7815
target_version: 1.12.1
tags: pullup

Some Linux systems now come with facilities to mark the stack as
non-executable, making it more difficult to exploit buffer overrun
bugs.  For this to work, object files built from assembly need a
section added to note whether they require an executable stack.

Patch from Dhiru Kholia with comments added.  More information at:
https://bugzilla.redhat.com/show_bug.cgi?id=1045699
https://wiki.gentoo.org/wiki/Hardened/GNU_stack_quickstart

ticket: 7813
target_version: 1.12.1
tags: pullup

Wherever we use k5alloc with a multiplication in the size parameter,,
use the new k5calloc helper function instead.

If yasm and cpuid.h are present on a Linux i686 or x64 system, compile
the modified Intel AES-NI assembly sources.  In the builtin AES enc
provider, check at runtime whether the CPU supports AES-NI
instructions and use the assembly functions if so.

Remove functions we don't need.  Add macros to redefine functions with
an appropriate namespace prefix.

Add assembly files from the Intel AESNI Sample Library, version 1.2,
which implement AES encryption using AES-NI instructions.  Trailing
whitespace was removed.

In preparation for AES-NI support, adjust the block encryption helpers
in the AES enc provider so that the cache is only touched by helpers,
and reframe the CTS operations in terms of CBC operations.  Change the
Camellia enc provider as well for consistency.