Don't rethrow the targetException of InvocationTargetException when calling the ProxyBuilder$callSuper

[oxyroid]

dexmaker/dexmaker/src/main/java/com/android/dx/stock/ProxyBuilder.java

Lines 666 to 668 in 1e70ace

	} catch (InvocationTargetException e) {
	throw e.getCause();
	}

The InvocationTargetException type is useful to locate the source of the target method exception, I think it should be retained.