Build only userdata.img.
Build only userdata.img.

Use build command like:
$make -j16 showcommands userdataimage dist TARGET_PRODUCT=trygon_with_data_preloaded TARGET_BUILD_VARIANT=user

Change-Id: I964490e03090c3696d1595c92363273e35cfaed7

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