strace: Update to 4.20

Compiled and tested on mvebu. Mainly a kernel 4.14 change. Also
reordered the Makefile a little bit.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

package/devel/strace/Makefile

@@ -9,13 +9,12 @@ include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=strace
-
-PKG_VERSION:=4.19
+PKG_VERSION:=4.20
 PKG_RELEASE:=1
-PKG_HASH:=7c93ebc6c29280f47c24a0eb86873a99ccb2cac6512c60a60ba4ef99ab807281
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@SF/$(PKG_NAME)
+PKG_HASH:=5bf3148dd17306a42566f7da17368fdd781afa147db05ea63a4ca2b50f58c523
 
 PKG_LICENSE:=BSD-3c
 PKG_LICENSE_FILES:=COPYRIGHT