1) Add EpocEngineHelper#hasFeatureVariantKeyword(...)
2) Make sure retrieval of makefile directory and makefile name hadles default ARMV5 case
where config is a variant but the FEATUREVARIANT keyword is not specified.
source.. = src/,\
schema/
output.. = bin/
bin.includes = plugin.xml,\
META-INF/,\
.,\
data/,\
icons/,\
plugin.properties