Bump platform version to 4.
Bump platform version to 4.

Not sure why this didn't get integrated from Donut.

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