test_perf2.c should measure the time to create the file as well, for shared vs. static testing

[edhartnett]

Part of the performance tests is to see if there is a detectable difference between shared and static libraries on a HPC system. For that to be measured, the first call of a PIO function must be included in the timing, because that's where the library load happens.

[edhartnett]

Or we can take a more zen approach, and let go of our desire to know this.

It seems that this is not a very interesting issue to most users.