libidn: Fix error debian/patches not found
libidn: Fix error debian/patches not found

- Source format is 3.0 (quilt) but there is no debian patch,
  empty DEBIAN_QUILT_PATCHES to avoid this error.
- libidn cannot be built parallel, set PARALLEL_MAKE = "" to avoid error:
  | .../src/idn.c:140: undefined reference to `cmdline_parser'

Signed-off-by: Tran Thi Van Dung <4602a2150458a8fc79ca562d1ec5fffebd9f9638@toshiba-tsdv.com>

tienlee/meta-debian,meta-debian/meta-debian,nghiaht-tsdv/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian,nghiaht-tsdv/meta-debian,tienlee/meta-debian,tienlee/meta-debian,nghiaht-tsdv/meta-debian,nghiaht-tsdv/meta-debian,meta-debian/meta-debian,nghiaht-tsdv/meta-debian,tienlee/meta-debian,tienlee/meta-debian,tienlee/meta-debian,meta-debian/meta-debian,nghiaht-tsdv/meta-debian