ANDROID: Add allowed symbols required from Qualcomm drivers

With the commit 1a476214 ("rpmsg: qcom: glink: replace strncpy() with
strscpy_pad()"), the kernel module "qcom_glink_native.ko" added the new
requirement to exported kernel symbol "strscpy_pad". Add the symbol into
symbol list to make it able to boot with android common kernel.

Leaf changes summary: 1 artifact changed (1 filtered out)
Changed leaf types summary: 0 (1 filtered out) 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 long int strscpy_pad(char*, const char*, unsigned long int)'

Bug: 262180725
Change-Id: I5aa8cebc72d7989d353290bdef0c0ddb65c6de94
Signed-off-by: JohnnLee <johnnlee@google.com>