Adding missing dep as per bug:

http://bugs.gentoo.org/show_bug.cgi?id=311231

--- hdf-java-2.6.1.ebuild
+++ hdf-java-2.6.1.ebuild
@@ -16,7 +16,7 @@
 IUSE="hdf"
 
 CDEPEND=">=sci-libs/hdf5-1.8[szip]
-	hdf? ( sci-libs/hdf )
+	hdf? ( sci-libs/hdf[netcdf] )
 	>=media-libs/jpeg-7
 	sys-libs/zlib"
 RDEPEND="${CDEPEND}