kselftest: disable mremap on 32 bit

The 32-bit systems doesn't have a large enough address space to run
the mremap tests.

Bug: 265006084
Test: atest vts_linux_kselftest_arm_32:vm_mremap_test_arm_32#vm_mremap_test_arm_32 -- --abi armeabi-v7a
Test: atest vts_linux_kselftest_x86_32:vm_mremap_test_x86_32#vm_mremap_test_x86_32 -a
Change-Id: Ibad59394ba0b515ab219ef47c56e9150f49dfa9b
Signed-off-by: Edward Liaw <edliaw@google.com>
2 files changed