perf tools: Add a test for decoding of new x86 instructions

Add a new test titled:

	Test x86 instruction decoder - new instructions

The purpose of this test is to check the instruction decoder after new
instructions have been added.  Initially, MPX instructions are tested
which are already supported, but the definitions in x86-opcode-map.txt
will be tweaked in a subsequent patch, after which this test can be run
to verify those changes.

The data for the test comes from assembly language instructions in
insn-x86-dat-src.c which is converted into bytes by the scripts
gen-insn-x86-dat.sh and gen-insn-x86-dat.awk, and included into the test
program insn-x86.c as insn-x86-dat-32.c and insn-x86-dat-64.c.

The conversion is not done as part of the perf tools build because the
test data must be under (git) change control in order for the test to be
repeatably-correct.  Also it may require a recent version of binutils.

Commiter notes:

Using it:

  # perf test decoder
  39: Test x86 instruction decoder - new instructions          : Ok
  # perf test -v decoder
  39: Test x86 instruction decoder - new instructions          :
  --- start ---
  test child forked, pid 21970
  Decoded ok: 0f 31                	rdtsc
  Decoded ok: f3 0f 1b 00          	bndmk  (%eax),%bnd0
  Decoded ok: f3 0f 1b 05 78 56 34 12 	bndmk  0x12345678,%bnd0
  Decoded ok: f3 0f 1b 18          	bndmk  (%eax),%bnd3
  <SNIP>
  Decoded ok: f2 e9 00 00 00 00    	bnd jmpq 402 <main+0x402>
  Decoded ok: f2 e9 00 00 00 00    	bnd jmpq 408 <main+0x408>
  Decoded ok: 67 f2 ff 21          	bnd jmpq *(%ecx)
  Decoded ok: f2 0f 85 00 00 00 00 	bnd jne 413 <main+0x413>
  test child finished with 0
  ---- end ----
  Test x86 instruction decoder - new instructions: Ok
  #

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Qiaowei Ren <qiaowei.ren@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1441196131-20632-3-git-send-email-adrian.hunter@intel.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>