Add clean step for Launcher & Launcher2
Add clean step for Launcher & Launcher2

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