Avoid using thread cache in unwinder.

Using  thread cache will cause SIGSEGV for 32bit+kernel4.9 device.

Bug: 190579082
Bug: 189803009

Test: run cts -m CtsSeccompHostTestCases
Change-Id: I47b13d02674aadbacd8dac36d8382eed0885413c
Signed-off-by: yidong zhang <yidong.zhang@amlogic.com>
1 file changed