Build targets for checking GKI KMI compatibility

Current/latest kernel symbol information files default to:
- kernel/prebuilts/5.4/arm64/Module.symvers (for GKI 5.4)
- kernel/prebuilts/5.10/arm64/vmlinux.symvers (for GKI 5.10)

All kernel symbol information files in this CL are manually copied
from AB of corresponding kernel branches.

The history kernel symbol information files in this CL are
sym-5.*/ directories. The ones without build ID suffix are
symbolic links to the latest ones and can be used for
testing the build test of this CL (see Test below).

After *.symvers diles are released to kernel/prebuilts/5.*/arm64
directories on the Android branch, they will be used as the
current/latest kernel symbol files by default.

3 moudules are created in this CL:
  gki_5_4_kmi_compatibility_test (for arm64 GKI 5.4)
  gki_5_10_kmi_compatibility_test (for arm64 GKI 5.10)
  gki_kmi_compatibility_test (for both arm64 GKI 5.4 & 5.10)

Bug: 206064990
Test: $ m gki_kmi_compatibility_test
Change-Id: I2e966070a392cfd6284676c7598138b5cad4717b
12 files changed