Clean up libziparchive Android.mk

Removed LOCAL_C_INCLUDES which are no longer necessary as zlib
now uses the LOCAL_EXPORT_C_INCLUDE_DIRS mechanism.

Removed a couple of redundant LOCAL_MODULE entries

Tested compiling some of the projects that make use of libziparchive
and libziparchive-host using a clean out dir with aosp_flounder-userdebug
aosp_arm-eng targets

make -j3 libziparchive libandroidfw libartd libart libjavacore libjavacoretests aapt

Change-Id: I2988f1b3a62d1df2b5eada4ad39a9246ac1184fb