[tools] libtool: strip unsave directories from relink command, nuke every -L that looks like /usr/lib or /lib

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24741 3c298f89-4303-0410-b956-a3cf2f4a3e73

tools/libtool/patches/120-strip-unsafe-dirs-for-relinking.patch

@@ -0,0 +1,12 @@
+--- a/libltdl/config/ltmain.m4sh
++++ b/libltdl/config/ltmain.m4sh
+@@ -2183,6 +2183,9 @@ func_mode_install ()
+ 	    relink_command=`$ECHO "$relink_command" | $SED "s%@inst_prefix_dir@%%"`
+ 	  fi
+ 
++	  relink_command=`$ECHO "$relink_command" | $SED "s%-L[[:space:]]*/lib[^[:space:]]*%%"`
++	  relink_command=`$ECHO "$relink_command" | $SED "s%-L[[:space:]]*/usr/lib[^[:space:]]*%%"`
++
+ 	  func_warning "relinking \`$file'"
+ 	  func_show_eval "$relink_command" \
+ 	    'func_fatal_error "error: relink \`$file'\'' with the above command before installing it"'