Update configure to look for README.md instead of README

configure

 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.69 for breakpad 0.1.
 #
 # Report bugs to <google-breakpad-dev@googlegroups.com>.
 #
 #
 # Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
 #
 #
@@ skipping 567 matching lines @@
 MAKEFLAGS=
 
 # Identity of this package.
 PACKAGE_NAME='breakpad'
 PACKAGE_TARNAME='breakpad'
 PACKAGE_VERSION='0.1'
 PACKAGE_STRING='breakpad 0.1'
 PACKAGE_BUGREPORT='google-breakpad-dev@googlegroups.com'
 PACKAGE_URL=''
 
-ac_unique_file="README"
+ac_unique_file="README.md"
 # Factoring default headers for most tests.
 ac_includes_default="\
 #include <stdio.h>
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 #ifdef HAVE_SYS_STAT_H
 # include <sys/stat.h>
 #endif
 #ifdef STDC_HEADERS
@@ skipping 7475 matching lines @@
   exec 5>>config.log
   # Use ||, not &&, to avoid exiting from the if with $? = 1, which
   # would make configure fail if this is the last instruction.
   $ac_cs_success || as_fn_exit 1
 fi
 if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
 $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 fi