Align ITT library name between SEAPI and VTune

[dvrogozh]

SEAPI and VTune name ITT library differently:

• libittnotify64.a - SEAPI
• libittnotify.a - VTune
  Could you, please, align the name? From my perspective having bitness in the library name is useless on Linux.

[raphaelcohn]

@dvrogozh Seems the problem is naive code in CMakeLists.txt which doesn't check the platform first before using the architecture to name the binary. More worrying is that the codebases between this and vtune seem to be divergent... so Intel's commercial product isn't eating the same dog food potentially. Not good.