ANDROID: GKI: sort the list of symbol lists

Trying to verify that all of the proper files are being pulled in for
the ABI symbol list is easier if they are in sorted order.

Bug: 193853163
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I663313ea6d61b2ab80b3fd8e29098e694ff4ef00