testing: Add newline on last line of TestReadNonBPFile.cpp
testing: Add newline on last line of TestReadNonBPFile.cpp

Otherwise some compilers warn:

    warning: last line of file ends without a newline

ornladios/ADIOS2,ornladios/ADIOS2,JasonRuonanWang/ADIOS2,ornladios/ADIOS2,JasonRuonanWang/ADIOS2,ornladios/ADIOS2,ornladios/ADIOS2,JasonRuonanWang/ADIOS2,JasonRuonanWang/ADIOS2,JasonRuonanWang/ADIOS2