java-vm-2.eclass: add BDEPEND="app-arch/unzip"

Thanks to David 'soap' Seifert for pointing out the missing whitespace
when appending BDEPEND to DEPEND.

Closes: https://bugs.gentoo.org/850415
Closes: https://github.com/gentoo/gentoo/pull/25804
Reported-by: Joonas Niilola <juippis@gentoo.org>
Signed-off-by: Florian Schmaus <flow@gentoo.org>

eclass/java-vm-2.eclass

@@ -24,6 +24,11 @@ RDEPEND="
 	app-eselect/eselect-java
 "
 DEPEND="${RDEPEND}"
+BDEPEND="app-arch/unzip"
+
+if [[ ${EAPI} == 6 ]]; then
+	DEPEND+=" ${BDEPEND}"
+fi
 
 export WANT_JAVA_CONFIG=2