only auto-generate board= requirement if a board-info file is not specified
only auto-generate board= requirement if a board-info file is not specified

If a board-info file is specified (as is usually the case) we should honor
its requirements.

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