Increasing timeout for RecursiveTaskTest

The RecursiveTaskTest times out waiting for the recursive task to
terminate when run under gcstress. Increasing the timeout to
allow all the recursive tasks to run.

(cherry picked from commit fc8124c7809f78647fca5f8b63547e06baa26c5f)

Fixes: 189340966
Test: atest RecursiveTaskTest
Merged-In: I9e989cd6067181b0948daa941ab9275bc7eba067
Change-Id: I1a0b89b15b4297e1201f778254f5fc1a813a8ff7
1 file changed