knetbsd/kfreebsd patches from Robert Millan.

* libtool.m4: Add kfreebsd*-gnu and knetbsd*-gnu.
* ltconfig: Likewise.
* ltcf-c.sh: Likewise.
* ltcf-cxx.sh: Likewise.
* ltcf-gcj.sh: Likewise.

libtool.m4

@@ -577,7 +577,7 @@ darwin* | rhapsody*)
   esac
   ;;
 
-freebsd* )
+freebsd* | kfreebsd*-gnu)
   if echo __ELF__ | $CC -E - | grep __ELF__ > /dev/null; then
     case $host_cpu in
     i*86 )
@@ -645,7 +645,7 @@ linux-gnu*)
   lt_cv_file_magic_test_file=`echo /lib/libc.so* /lib/libc-*.so`
   ;;
 
-netbsd*)
+netbsd* | knetbsd*-gnu)
   if echo __ELF__ | $CC -E - | grep __ELF__ > /dev/null; then
     [lt_cv_deplibs_check_method='match_pattern /lib[^/\.]+\.so\.[0-9]+\.[0-9]+$']
   else