Set INSANE_SKIP for lua package

QA checks for so links and raises an error, but Lua does not work
correctly if the library has not a .so extension. Just use the link set
by SWUpdate.

Signed-off-by: Stefano Babic <sbabic@denx.de>

recipes-support/swupdate/swupdate.inc

@@ -41,6 +41,7 @@ PACKAGES =+ " \
     ${PN}-usb \
     ${PN}-www \
 "
+INSANE_SKIP_${PN}-lua = "dev-so"
 
 # tools is now an empty meta package for backward compatibility
 ALLOW_EMPTY_${PN}-tools = "1"