Fix sword and clucene detection

This resolves Bug 1145

clucene.m4

@@ -133,7 +133,7 @@ int main(int argc, char* argv[[]]) {
 EOF
 
 
-ac_link='$LIBTOOL_SHELL --silent --mode=link ${CXX-g++} -o conftest $CXXFLAGS $all_includes $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+ac_link='$LIBTOOL_SHELL --silent --mode=link --tag=LD ${CXX-g++} -o conftest $CXXFLAGS $all_includes $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
 if AC_TRY_EVAL(ac_link) && test -s conftest; then
 	if test -x conftest; then
 		eval ac_cv_installed_clucene_version=`./conftest 2>&5`

sword.m4

@@ -119,7 +119,7 @@ int main(int argc, char** argv) {
 EOF
 
 
-ac_link='$LIBTOOL_SHELL --silent --mode=link ${CXX-g++} -o conftest $CXXFLAGS $all_includes $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+ac_link='$LIBTOOL_SHELL --silent --mode=link --tag=LD ${CXX-g++} -o conftest $CXXFLAGS $all_includes $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
 if AC_TRY_EVAL(ac_link) && test -s conftest; then
 	if test -x conftest; then
 		eval ac_cv_installed_sword_version=`./conftest 2>&5`
@@ -192,7 +192,7 @@ int main(int argc, char** argv) {
 }
 EOF
 
-ac_link='$LIBTOOL_SHELL --silent --mode=link ${CXX-g++} -o conftest $CXXFLAGS $all_includes $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+ac_link='$LIBTOOL_SHELL --silent --mode=link --tag=LD ${CXX-g++} -o conftest $CXXFLAGS $all_includes $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
 if AC_TRY_EVAL(ac_link) && test -s conftest; then
 	if test -x conftest; then
 		eval ac_cv_sword_recent_version=`./conftest $1 2>&5`