thermal: add missing get_os before check the return value

'ps' have different output between Android and ubuntu, and test suite
use get_os to determine which OS the scripts are running on.

at commit 84479a38, thermal: Get correct PID for heat_cpu based on OS
this patch want to get PID based on OS, but it looks thermal_06.sh forget to
add get_os before checking the OS.

Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
1 file changed