add ebuild: dev-libs/json_spirit-4.07
add EAPI to dev-libs/dsncompat ebuild.

Signed-off-by: Peter Hille (png!das-system) <peter@das-system-networks.de>
add EAPI to dev-libs/dsnutil ebuild.

Signed-off-by: Peter Hille (png!das-system) <peter@das-system-networks.de>