RDRAND (R64) - Throughput and Uops

With 1 independent instruction

With unroll_count=10 and no inner loop

Code:
```
   0:	49 0f c7 f0          	rdrand r8
```
Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 6160.1
- Reference cycles: 5472.95
- UOPS_EXECUTED.THREAD: 11108.75
- RETIRE_SLOTS: 11045.0
- UOPS_MITE: 0.0
- UOPS_MS: 11215.8
- UOPS_PORT_0: 2385.63
- UOPS_PORT_1: 2330.65
- UOPS_PORT_2: 765.95
- UOPS_PORT_3: 766.95
- UOPS_PORT_4: 17.95
- UOPS_PORT_5: 2294.4
- UOPS_PORT_6: 2534.1
- UOPS_PORT_7: 10.1
- DIV_CYCLES: 0.0
- ILD_STALL.LCP: 0.0
- UOPS_MITE>=1: 0.0

With unroll_count=10, no inner loop, and 1 NOP

Code:

   0:	49 0f c7 f0          	rdrand r8
   4:	90                   	nop

Show nanoBench command
Results:
- Instructions retired: 2.0
- Core cycles: 6160.53
- Reference cycles: 5472.95
- UOPS_EXECUTED.THREAD: 11109.0
- RETIRE_SLOTS: 11046.0
- UOPS_MITE: 1.0
- UOPS_MS: 11215.45
- UOPS_PORT_0: 2386.98
- UOPS_PORT_1: 2328.25
- UOPS_PORT_2: 765.95
- UOPS_PORT_3: 767.02
- UOPS_PORT_4: 17.93
- UOPS_PORT_5: 2297.32
- UOPS_PORT_6: 2533.72
- UOPS_PORT_7: 10.07
- DIV_CYCLES: 0.0
- ILD_STALL.LCP: 0.0
- UOPS_MITE>=1: 1.0

With loop_count=10 and unroll_count=1

Code:
```
   0:	49 0f c7 f0          	rdrand r8
```
Show nanoBench command
Results:
- Instructions retired: 3.0
- Core cycles: 6160.33
- Reference cycles: 5470.73
- UOPS_EXECUTED.THREAD: 11110.0
- RETIRE_SLOTS: 11046.0
- UOPS_MITE: 1.0
- UOPS_MS: 11215.57
- UOPS_PORT_0: 2387.35
- UOPS_PORT_1: 2328.28
- UOPS_PORT_2: 765.95
- UOPS_PORT_3: 767.02
- UOPS_PORT_4: 17.88
- UOPS_PORT_5: 2298.0
- UOPS_PORT_6: 2534.8
- UOPS_PORT_7: 10.07
- DIV_CYCLES: 0.0
- ILD_STALL.LCP: 0.0
- UOPS_MITE>=1: 1.0