Fix: Eclipse project build.

The hard-coded path is obviously not right. Added the missing JAR.

Now the project builds, but tests don't run. This is something related to 32/64 bit I think on Windows and I can't remember how we fixed it. Appreciate any suggestions.

```
java.lang.UnsatisfiedLinkError: Native library (com/sun/jna/win32-x86-64/jnidispatch.dll) not found in resource path ([file:/C:/Users/dblock/Source/GitHub/jna/dblock/jna/build.eclipse/test-classes/, file:/C:/Users/dblock/Source/GitHub/jna/dblock/build.eclipse/test-classes/, file:/C:/Users/dblock/Source/GitHub/jna/dblock/build.eclipse/classes/, file:/C:/Program%20Files/Eclipse/plugins/org.junit_3.8.2.v3_8_2_v20100427-1100/junit.jar, file:/C:/Users/dblock/Source/GitHub/jna/dblock/lib/test/reflections-0.9.8.jar, file:/C:/Program%20Files/Eclipse/configuration/org.eclipse.osgi/bundles/207/2/.cp/])
	at com.sun.jna.Native.loadNativeDispatchLibraryFromClasspath(Native.java:721)
	at com.sun.jna.Native.loadNativeDispatchLibrary(Native.java:689)
	at com.sun.jna.Native.<clinit>(Native.java:128)
	at com.sun.jna.NativeLong.<clinit>(NativeLong.java:23)
	at com.sun.jna.platform.win32.WinError.<clinit>(WinError.java:24247)
	at com.sun.jna.platform.win32.Shell32Test.testSHGetFolderPath(Shell32Test.java:32)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at junit.framework.TestCase.runTest(TestCase.java:164)
	at junit.framework.TestCase.runBare(TestCase.java:130)
	at junit.framework.TestResult$1.protect(TestResult.java:106)
	at junit.framework.TestResult.runProtected(TestResult.java:124)
	at junit.framework.TestResult.run(TestResult.java:109)
	at junit.framework.TestCase.run(TestCase.java:120)
	at junit.framework.TestSuite.runTest(TestSuite.java:230)
	at junit.framework.TestSuite.run(TestSuite.java:225)
	at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
```