Change ro.twrp.boot boolean to twrp.crash_counter

Change-Id: If1ef25fee5a138a90ccb4f0a70b20b55698e0d0d
Signed-off-by: Vojtech Bocek <vbocek@gmail.com>
Check the crash counter instead of date in TWFunc::Fixup_Time_On_Boot()

* Some devices (Sony) have RTC counting up from year 2009,

Change-Id: I2cf1928e1b05c7e8b184963f8130582e0319ddc4
Signed-off-by: Vojtech Bocek <vbocek@gmail.com>