libmeminfo: Fix libmeminfo_test for x86 architecture am: bef9540d57 am: c37a1d346a am: dc2171bc6e

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

Change-Id: Ida393392dc74ea14a8918d324d43b0c712afe6f5