Fix build with java 9

OBS-URL: https://build.opensuse.org/package/show/Java:packages/jsch?expand=0&rev=19

jsch-0.1.54-sourcetarget.patch

@@ -0,0 +1,13 @@
+--- jsch-0.1.54/build.xml	2016-08-30 09:06:39.000000000 +0200
++++ jsch-0.1.54/build.xml	2017-09-08 10:27:56.694518991 +0200
+@@ -35,8 +35,8 @@
+     </available>
+     <javac srcdir="${src}"
+            destdir="${build}"
+-           target="1.4"
+-           source="1.4"
++           target="1.6"
++           source="1.6"
+            debug="${javac.debug}">
+       <classpath refid="lib.path.ref"/>
+       <exclude name="com/jcraft/jsch/jcraft/Compression.java"

jsch.spec

@@ -27,6 +27,7 @@ Source0:        http://downloads.sourceforge.net/%{name}/%{name}-%{version}.zip
 Source1:        MANIFEST.MF
 Source2:        plugin.properties
 Source3:        http://repo1.maven.org/maven2/com/jcraft/%{name}/%{version}/%{name}-%{version}.pom
+Patch0:         jsch-0.1.54-sourcetarget.patch
 BuildRequires:  ant
 BuildRequires:  java-devel >= 1.6.0
 BuildRequires:  javapackages-local
@@ -63,6 +64,7 @@ functionality into your own Java programs.
 
 %prep
 %setup -q
+%patch0 -p1
 
 %build
 export CLASSPATH=$(build-classpath jzlib)