[fix, Android] thirdparty/zlib LDFLAGS typo (#880)
[fix, Android] thirdparty/zlib LDFLAGS typo (#880)

Obviously it's not LD_FLAGS. Fixes <https://github.com/koreader/koreader/issues/4833>.
houqp/koreader-base,koreader/koreader-base,houqp/koreader-base,Frenzie/koreader-base,houqp/koreader-base,Frenzie/koreader-base,NiLuJe/koreader-base,houqp/koreader-base,NiLuJe/koreader-base,koreader/koreader-base,Frenzie/koreader-base,koreader/koreader-base,Frenzie/koreader-base,NiLuJe/koreader-base,koreader/koreader-base,NiLuJe/koreader-base