ANDROID: proc: fix depreciated call to get_user_pages in task_mmu

"mm: add a field to store names for private anonymous memory"
(AOSP commit ee8c5f78f09a) uses a depreciated call to get_user_pages
which generates the following compile warning:

fs/proc/task_mmu.c: In function 'seq_print_vma_name':
fs/proc/task_mmu.c:154:3: warning: 'get_user_pages8' is deprecated
(declared at include/linux/mm.h:1295) [-Wdeprecated-declarations]
   pages_pinned = get_user_pages(current, mm, page_start_vaddr,
   ^

include/linux/mm.h explains get_user_pages function call using
struct task_struct *tsk and struct mm_struct *mm (not using
current task and current->mm) should now be:
get_user_pages_remote

Fixes: AOSP Change-ID: I9aa7b6b5ef536cd780599ba4e2fba8ceebe8b59f
       ("mm: add a field to store names for private anonymous memory")
Signed-off-by: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>