libmeminfo: Fix libmeminfo_test for x86 architecture am: bef9540d57 am: c37a1d346a

Original change: https://android-review.googlesource.com/c/platform/system/memory/libmeminfo/+/1441352

Change-Id: I76d2d9753cfb3ba57a0bd08614cf921d6d5357b7