Workaround SecurityException in FS#getFsTimestampResolution

On Android FS#getFsTimestampResolution always throws a
SecurityException, handle this by falling back to the fallback timestamp
resolution.

Bug: 548947
Change-Id: I0ee6cb3c20e189bdc8d488434a930427ad6f2df2
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/util/FS.java

@@ -281,7 +281,7 @@ public abstract class FS {
 			} catch (IOException | InterruptedException
 					| ExecutionException e) {
 				LOG.error(e.getMessage(), e);
-			} catch (TimeoutException e) {
+			} catch (TimeoutException | SecurityException e) {
 				// use fallback
 			}
 			return FALLBACK_TIMESTAMP_RESOLUTION;