oprofile: fix path to kernel headers

Signed-off-by: Felix Fietkau <[email protected]>

SVN-Revision: 46588

package/devel/oprofile/Makefile

@@ -50,6 +50,7 @@ endef
 define Build/Configure
 	$(call Build/Configure/Default, \
 		--with-kernel-support \
+		--with-kernel=$(LINUX_DIR)/user_headers \
 		--without-x \
 	)
 endef