You don't seem to have the plugin.xml
(and possibly other things) in your build.properties
. A more or less standard build.properties
for a plug-in would be:
source.. = src/
output.. = bin/
bin.includes = META-INF/,\
.,\
OSGI-INF/,\
plugin.xml
OSGI-INF
can be left out if you don't have that folder.