Bug 20740 Broken check for dwarf_getalt in configure.ac
    
    There is a missing space around the "=" operator in the conditional
    expression of the test below:
    
      if test x$FOUND_DWARF_GETALT_IN_LIBDW=xyes; then
         AC_DEFINE([LIBDW_HAS_DWARF_GETALT], 1,
                   [Defined if libdw has the function dwarf_getalt])
      fi
    
    This patch fixes that.  Oops.
    
    	* configure.ac: Add missing spaces around the "=" of a conditional
    	expression.
    
    Signed-off-by: Dodji Seketeli <dodji@redhat.com>