Fix JitEECallTimingInfo bit rot (#868)

Fix JitEECallTimingInfo bit rot (#868)

Added new JIT/EE interface functions. Moved some around so
the order of functions is exactly the same order as in the
corinfo.h header file.

This functionality can be enabled by:
1. Changing the definition of `MEASURE_CLRAPI_CALLS` in jit.h
from `0` to `1`.
2. Building Release on x86 or x64 (arm32 and arm64 are currently unsupported)
3. Set environment variables:
```
set COMPlus_JitTimeLogFile=time.txt
set COMPlus_JitEECallTimingInfo=1
```
4. Run a program.

The `time.txt` file will contain a JIT phase time line item "CLR API calls"
for the sum total of all JIT-EE function call cost, plus a per-API breakdown
for each called API with number of calls, total/max/average time, and percentage
of total ABI call cost.