Update configure to look for README.md instead of README

This is required after daed3a43836e. configure won't run as-is, reported
in https://codereview.chromium.org/1357773004/.

R=andybons@chromium.org

Review URL: https://codereview.chromium.org/1361993002 .

Makefile.in

@@ -1883,9 +1883,9 @@ am__DIST_COMMON = $(srcdir)/Makefile.in \
 	$(top_srcdir)/autotools/missing \
 	$(top_srcdir)/autotools/test-driver \
 	$(top_srcdir)/src/config.h.in AUTHORS ChangeLog INSTALL NEWS \
-	README autotools/compile autotools/config.guess \
-	autotools/config.sub autotools/depcomp autotools/install-sh \
-	autotools/ltmain.sh autotools/missing
+	autotools/compile autotools/config.guess autotools/config.sub \
+	autotools/depcomp autotools/install-sh autotools/ltmain.sh \
+	autotools/missing
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 distdir = $(PACKAGE)-$(VERSION)
 top_distdir = $(distdir)

configure

@@ -585,7 +585,7 @@ 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>

configure.ac

@@ -32,7 +32,7 @@ AC_PREREQ(2.57)
 
 AC_INIT(breakpad, 0.1, google-breakpad-dev@googlegroups.com)
 dnl Sanity check: the argument is just a file that should exist.
-AC_CONFIG_SRCDIR(README)
+AC_CONFIG_SRCDIR(README.md)
 AC_CONFIG_AUX_DIR(autotools)
 AC_CONFIG_MACRO_DIR([m4])
 AC_CANONICAL_HOST