extras/tools/libtool: remove crude hack for legacy OS X platforms

extras/tools/libtool-2.4.2-bitcode.patch

+diff -ru libtool/libltdl/config/ltmain.m4sh libtool-fixed/libltdl/config/ltmain.m4sh
+--- libtool/libltdl/config/ltmain.m4sh	2011-10-17 12:17:05.000000000 +0200
++++ libtool-fixed/libltdl/config/ltmain.m4sh	2015-09-30 22:03:22.000000000 +0200
+@@ -7928,16 +7928,6 @@
+ 
+       case $host in
+       *-*-darwin*)
+-	# Don't allow lazy linking, it breaks C++ global constructors
+-	# But is supposedly fixed on 10.4 or later (yay!).
+-	if test "$tagname" = CXX ; then
+-	  case ${MACOSX_DEPLOYMENT_TARGET-10.0} in
+-	    10.[0123])
+-	      func_append compile_command " ${wl}-bind_at_load"
+-	      func_append finalize_command " ${wl}-bind_at_load"
+-	    ;;
+-	  esac
+-	fi
+ 	# Time to change all our "foo.ltframework" stuff back to "-framework foo"
+ 	compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
+ 	finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
+diff -ru libtool/libltdl/config/ltmain.sh libtool-fixed/libltdl/config/ltmain.sh
+--- libtool/libltdl/config/ltmain.sh	2011-10-17 12:19:35.000000000 +0200
++++ libtool-fixed/libltdl/config/ltmain.sh	2015-09-30 22:03:44.000000000 +0200
+@@ -8715,16 +8715,6 @@
+ 
+       case $host in
+       *-*-darwin*)
+-	# Don't allow lazy linking, it breaks C++ global constructors
+-	# But is supposedly fixed on 10.4 or later (yay!).
+-	if test "$tagname" = CXX ; then
+-	  case ${MACOSX_DEPLOYMENT_TARGET-10.0} in
+-	    10.[0123])
+-	      func_append compile_command " ${wl}-bind_at_load"
+-	      func_append finalize_command " ${wl}-bind_at_load"
+-	    ;;
+-	  esac
+-	fi
+ 	# Time to change all our "foo.ltframework" stuff back to "-framework foo"
+ 	compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
+ 	finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`

extras/tools/tools.mak

@@ -82,6 +82,7 @@ libtool-$(LIBTOOL_VERSION).tar.gz:
 
 libtool: libtool-$(LIBTOOL_VERSION).tar.gz
 	$(UNPACK)
+	$(APPLY) libtool-2.4.2-bitcode.patch
 	$(MOVE)
 
 .libtool: libtool .automake