Only turn host build on for linux
Only turn host build on for linux

Change-Id: I2d3b16f7881ad82cf272a40213dd4e173f54baa0

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