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.

ltconfig

@@ -1164,6 +1164,17 @@ gnu*)
   hardcode_into_libs=yes
   ;;
 
+kfreebsd*-gnu | knetbsd*-gnu)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so${major} ${libname}.so'
+  soname_spec='${libname}${release}.so$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  ;;
+
 hpux9* | hpux10* | hpux11*)
   # Give a soname corresponding to the major version so that dld.sl refuses to
   # link against other versions.