simpleperf: fix python test on windows.

Use python instead of python3 in inferno.bat, as python3 on windows use
python.exe.
Adjust checks in TestTools.test_objdump to accept objdump output on
windows.

Bug: 182507493
Test: run test/test.py --only-host-test on windows.
Change-Id: I44e5d88f10b937b6db6a44e39652774c888b6f91
2 files changed