Makefile: Link to the system logging library on Android

Makefile: Link to the system logging library on Android

Android replaces syslog calls with calls to the Android system logging
library, liblog. Link to liblog when compiling for Android to fix the
following undefined reference errors:

aarch64-linux-android-ld: log.o: in function `android_polyfill_vsyslog':
/usr/include/syslog.h:185: undefined reference to `__android_log_print'
aarch64-linux-android-ld: /usr/include/syslog.h:182: undefined reference to `__android_log_vprint'

Signed-off-by: Danny Lin <danny@kdrag0n.dev>