NativeMemoryProfiler no longer works as of 0.15

[mriehm]

In BenchmarkDotNet 0.15, the Allocated native memory and Native memory leak columns of the NativeMemoryProfiler are always blank. They work correctly in BenchmarkDotNet 0.14.

The issue is that NativeMemoryLogParser.IsCallStackIn() performs a case-sensitive search for the name of the EXE in the frame stack, but the module names in the frame stack are always lowercased. Prior to #2423, the name of the EXE was a GUID, so case-sensitivity didn't matter because there were no letters in the EXE name. After that commit, the EXE name now contains some uppercase characters, so IsCallStackIn() always returns false.