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: 5719.53
- Reference cycles: 4499.37
- UOPS_EXECUTED.THREAD: 8459.0
- RETIRE_SLOTS: 8416.0
- UOPS_MITE: 0.0
- UOPS_MS: 8534.43
- UOPS_PORT_0: 1811.62
- UOPS_PORT_1: 1783.83
- UOPS_PORT_2: 581.65
- UOPS_PORT_3: 580.43
- UOPS_PORT_4: 17.0
- UOPS_PORT_5: 1744.25
- UOPS_PORT_6: 1928.6
- UOPS_PORT_7: 11.73
- 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: 5715.85
- Reference cycles: 4496.8
- UOPS_EXECUTED.THREAD: 8459.03
- RETIRE_SLOTS: 8417.0
- UOPS_MITE: 1.0
- UOPS_MS: 8534.32
- UOPS_PORT_0: 1812.1
- UOPS_PORT_1: 1783.58
- UOPS_PORT_2: 581.87
- UOPS_PORT_3: 579.95
- UOPS_PORT_4: 17.0
- UOPS_PORT_5: 1743.35
- UOPS_PORT_6: 1929.8
- UOPS_PORT_7: 11.78
- 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: 5718.93
- Reference cycles: 4496.8
- UOPS_EXECUTED.THREAD: 8460.03
- RETIRE_SLOTS: 8417.0
- UOPS_MITE: 1.0
- UOPS_MS: 8534.63
- UOPS_PORT_0: 1810.75
- UOPS_PORT_1: 1783.72
- UOPS_PORT_2: 581.78
- UOPS_PORT_3: 580.12
- UOPS_PORT_4: 17.0
- UOPS_PORT_5: 1743.62
- UOPS_PORT_6: 1931.37
- UOPS_PORT_7: 11.85
- DIV_CYCLES: 0.0
- ILD_STALL.LCP: 0.0
- UOPS_MITE>=1: 1.0