File arts-aarch64.diff of Package arts

Without this libpthread.so (which is a ld script) isn't recognized as
shared library, leading to only static libs being built.
Index: arts-1.5.10/admin/libtool.m4.in
===================================================================
--- arts-1.5.10.orig/admin/libtool.m4.in	2008-08-19 22:18:41.000000000 +0200
+++ arts-1.5.10/admin/libtool.m4.in	2013-03-06 14:25:14.000000000 +0100
@@ -2181,7 +2181,7 @@ irix5* | irix6* | nonstopux*)
 # This must be Linux ELF.
 linux*)
   case $host_cpu in
-  alpha* | hppa* | i*86 | ia64* | m68* | mips* | powerpc* | sparc* | s390* | sh* | x86_64* )
+  aarch64* | alpha* | hppa* | i*86 | ia64* | m68* | mips* | powerpc* | sparc* | s390* | sh* | x86_64* )
     lt_cv_deplibs_check_method=pass_all ;;
   # the debian people say, arm and glibc 2.3.1 works for them with pass_all
   arm* )