Migrate the Windows native file-system refresh monitor to JNA

This avoids the native code necessary for JNI, while being only slightly
slower. At the same time it allows to use the 'Win32RefreshProvider' on
all CPU architectures on Windows.

Part of eclipse-platform/eclipse.platform.releng.aggregator#577

resources/bundles/org.eclipse.core.resources/META-INF/MANIFEST.MF

@@ -28,7 +28,9 @@ Export-Package: org.eclipse.core.internal.dtree;x-internal:=true,
 Require-Bundle: org.eclipse.ant.core;bundle-version="[3.1.0,4.0.0)";resolution:=optional,
  org.eclipse.core.expressions;bundle-version="[3.9.0,4.0.0)",
  org.eclipse.core.filesystem;bundle-version="[1.10.0,2.0.0)",
- org.eclipse.core.runtime;bundle-version="[3.31.0,4.0.0)"
+ org.eclipse.core.runtime;bundle-version="[3.31.0,4.0.0)",
+ com.sun.jna;bundle-version="[5.14.0,6.0.0)",
+ com.sun.jna.platform;bundle-version="[5.14.0,6.0.0)"
 Bundle-ActivationPolicy: lazy
 Service-Component: OSGI-INF/ResourceChangeListenerRegistrar.xml,
  OSGI-INF/org.eclipse.core.internal.resources.CheckMissingNaturesListener.xml

resources/bundles/org.eclipse.core.resources/build.properties

@@ -16,8 +16,7 @@ output.. = bin/
 source.ant_tasks/resources-ant.jar = src_ant/
 output.ant_tasks/resources-ant.jar = bin_ant/
 src.includes = about.html,\
-               schema/,\
-               natives/
+               schema/
 bin.includes = plugin.xml,\
                plugin.properties,\
                .options,\