Add align/overread tests for strlcpy/strlcat.

Change-Id: I2801c7ee1847cd68ec95eba5bdffde5e52edf1e5
Add the <dirent.h> feature macros glibc uses.

Change-Id: I4da92b67d410839ea4ef0beaaa6c5cca06b74c0d
Merge "Add the <dirent.h> feature macros glibc uses."
Merge "Add align/overread tests for strlcpy/strlcat."