Fixed missing / in build file.

Author: sirvaliance

build.xml

@@ -5,11 +5,11 @@
     <!-- Package properties -->
     <property name="package.name" value="android-async-http" />
     <property name="package.version" value="1.3.1" />
-    <property name="package.packagename" value="com.loopj.android.http" />
+       <property name="package.packagename" value="com.loopj.android.http" />
 
     <!-- Standard jar stuff -->
     <property name="jarfile" value="${package.name}-${package.version}.jar" />
-    <property name="lib.dir" value="${sdk.dir}platforms/${target}" />
+    <property name="lib.dir" value="${sdk.dir}/platforms/${target}" />
     <property name="build.dir" value="./build"/>
     <property name="classes.dir"  value="${build.dir}/classes"/>
     <buildnumber file="build.num" />
@@ -68,4 +68,4 @@
 
     <!-- Compile and package a jar -->
     <target name="package" depends="compile,jar" />
-</project>
+</project>