build: Fix linking error in Android
This fixes the following linker errors.
ld.lld: error: undefined symbol: __android_log_print
referenced by babl-internal.h:134 (../babl/babl-internal.h:134)
babl/libbabl-0.1.so.0.208.1.p/babl-component.c.o:(babl_fatal)
referenced by babl-internal.h:142 (../babl/babl-internal.h:142)
babl/libbabl-0.1.so.0.208.1.p/babl-component.c.o:(babl_fatal)
referenced by babl-internal.h:134 (../babl/babl-internal.h:134)
babl/libbabl-0.1.so.0.208.1.p/babl-component.c.o:(babl_log)