readline: Convert to BBCLASSEXTEND

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

meta/packages/readline/readline-native_5.2.bb

@@ -1,4 +0,0 @@
-require readline_${PV}.bb
-inherit native
-DEPENDS = "ncurses-native"
-FILESPATH = "${FILE_DIRNAME}/readline-${PV}:${FILE_DIRNAME}/readline:${FILE_DIRNAME}/files:${FILE_DIRNAME}"

meta/packages/readline/readline_5.2.bb

@@ -29,3 +29,5 @@ do_install () {
 	oe_libinstall -so -C shlib libhistory ${D}${libdir}
 	oe_libinstall -so -C shlib libreadline ${D}${libdir}
 }
+
+BBCLASSEXTEND = "native"