ANDROID: GKI: Update symbols to symbol list

Update get_wchan to symbol list externed by oem modules.

Leaf changes summary: 1 artifact changed
Changed leaf types summary: 0 leaf type changed
Removed/Changed/Added functions summary: 0 Removed, 0 Changed, 1 Added function
Removed/Changed/Added variables summary: 0 Removed, 0 Changed, 0 Added variable

1 Added function:

  [A] 'function unsigned long int get_wchan(task_struct*)'

Bug: 205684022
Signed-off-by: xieliujie <xieliujie@oppo.com>
Change-Id: I2c1f5821a7ab354552a87ad4aa6aaa2336d74424