minor autotools build system updates.

test/configure

@@ -581,7 +581,7 @@ PACKAGE_STRING=
 PACKAGE_BUGREPORT=
 PACKAGE_URL=
 
-ac_unique_file="README"
+ac_unique_file="loopwave.c"
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 SDL_TTF_LIB

test/configure.ac

@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_INIT
-AC_CONFIG_SRCDIR([README])
+AC_CONFIG_SRCDIR([loopwave.c])
 
 dnl Detect the canonical build and host environments
 AC_CONFIG_AUX_DIRS($srcdir/../build-scripts)