build images with minigzip instead of system gzip
build images with minigzip instead of system gzip

Use minigzip (from the zlib distribution, built in the android tree)
to compress images rather than the system install of gzip.  This will
let us send useful patches for images since we can make zlib available
in the applypatch program.

RR-msm7x30/platform_manifest,xorware/android_build,see4ri/lolili,fallouttester/platform_manifest,pranav01/platform_manifest,xorware/android_build,xorware/android_build,knone1/platform_manifest,xorware/android_build,hagar006/platform_manifest,ND-3500/platform_manifest,Hybrid-Power/startsync,xorware/android_build