d/mono-addins: Fix path of pkg-config files.

d/mono-addins/mono-addins.SlackBuild

@@ -35,7 +35,7 @@ WGET=${WGET:-http://ftp.novell.com/pub/mono/sources/mono-addins/$ARCHIVE}
 
 # Build infos
 NAMEPKG=${NAMEPKG:-mono-addins}
-BUILD=${BUILD:-1GGD}
+BUILD=${BUILD:-2GGD}
 ARCH=${ARCH:-$(uname -m | sed 's/^i.86$/i486/;s/^arm.*/arm/')}
 EXT=${EXT:-txz}
 
@@ -77,6 +77,12 @@ cd $NAME
 make
 make install DESTDIR=$PKG
 
+# On x86_64, install pkg-config files in /usr/lib64
+if [ "x$ARCH" = xx86_64 ]; then
+    mkdir -p $PKG/usr/lib64
+    mv $PKG/usr/lib/pkgconfig $PKG/usr/lib64/pkgconfig
+fi
+
 # Compress man pages
 find $PKG/usr/man  -type f -exec gzip -9 {} \;