Fix sim-eng build.
Fix sim-eng build.

Don't try to do the host build if we're configured for sim-eng.  They
seem to be clashing, and it's redundant anyway.

Change-Id: I8e1a24b6e07d28701b32b6559ba39337b211264d

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