Dirty htslib builds because of changes to aclocal.m4 when running autoreconf

[keithj]

$ git diff aclocal.m4                                                   
diff --git a/aclocal.m4 b/aclocal.m4                                    
index 7c76ad5..ae878b8 100644       
--- a/aclocal.m4                    
+++ b/aclocal.m4                    
@@ -1,7 +1,8 @@                     
-# generated automatically by aclocal 1.14.1 -*- Autoconf -*-           
-                                   
-# Copyright (C) 1996-2013 Free Software Foundation, Inc.               
+# generated automatically by aclocal 1.11.3 -*- Autoconf -*-           
                                    
+# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,  
+# 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation,   
+# Inc.                             
 # This file is free software; the Free Software Foundation             
 # gives unlimited permission to copy and/or distribute it,             
 # with or without modifications, as long as this notice is preserved.  
@@ -11,7 +12,6 @@                   
 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A        
 # PARTICULAR PURPOSE.              
                                    
-m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])        
 # pkg.m4 - Macros to locate and utilise pkg-config.            -*- Autoconf -*-                                                                
 # serial 1 (pkg-config-0.24)       
 #                                  

See samtools/htslib#733

[kjsanger]

Worked around by moving the aclocal file to one side temporarily, in the build script.