Omit -L part from ncurses6{w,}-config output

"ncurses6-config --libs" includes a "-L" part which is not needed
since the library is installed in a directory in the default linker
search path.

Upstream omits the -L part if $libdir is in a standard directory,
however the list of standard directories is determined at build time
and architecture dependent, breaking multiarch co-installability.
Until there is a way to obtain the multiarch path without running
dpkg-architecture our patch is not upstreamable.
Bug-Debian: https://bugs.debian.org/638281
Bug-Debian: https://bugs.debian.org/745479
Forwarded: not-needed
Last-Update: 2019-10-21

Gbp-Pq: Name 03-debian-ncursesconfig-omit-L.diff

misc/ncurses-config.in

@@ -41,7 +41,6 @@ exec_prefix="@exec_prefix@"
 
 bindir="@bindir@"
 includedir="@includedir@"
-libdir="@libdir@"
 datarootdir="@datarootdir@"
 datadir="@datadir@"
 mandir="@mandir@"
@@ -113,7 +112,7 @@ do
 	-L*)
 		[ -d ${opt##-L} ] || continue
 		case ${opt##-L} in
-		@LD_SEARCHPATH@) # skip standard libdir
+		*) # skip standard libdir
 			continue
 			;;
 		*)
@@ -235,7 +234,6 @@ ENDECHO
 		echo $INCS
 		;;
 	--libdir)
-		echo "${libdir}"
 		;;
 	--mandir)
 		echo "${mandir}"