ANDROID: abi_gki_aarch64_qcom: Add vendor hook for shmem_alloc_page

The commit 964220d0 ("ANDROID: shmem: vendor hook in
shmem_alloc_page") adds a vendor hook related to getting the page from
driver maintained pool first for the shmem pages. It also requires
already exported __mod_node_page_state function. Add these symbols to
the list.

Leaf changes summary: 2 artifacts 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, 1 Added
variable

1 Added function:

  [A] 'function void __mod_node_page_state(pglist_data*, node_stat_item,
long int)'

1 Added variable:

  [A] 'tracepoint __tracepoint_android_vh_shmem_alloc_page'

Bug: 187798288
Change-Id: Id4859df62a401f9b10daf9388cdb91f4aec99b78
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>