simpleperf: fix host python tests.

1. Fix parse_line_output in Addr2Nearestline, add new test for it.
2. Replace WithNative app with Cpp app in tests.
3. Use llvm-strip instead of strip. The latter can't understand test
binaries.

Bug: 203246914
Test: run scripts/test/test.py

Change-Id: Iffc4847dcf2b5a4ced172f7d9f49d4027b21aff5
4 files changed