aapt: hack around liblog-related undefined reference linker error

- add system_properties from bionic to satisfy linkage to liblog; error: undefined reference to '__system_property_area_serial' (https://android.googlesource.com/platform/bionic/+/master/libc/bionic)
- add header dependencies for system_properties (https://android.googlesource.com/platform/bionic/+/master/libc/private)