build: update autotools to modern standards.

This includes removing AC_CANONICAL_BUILD/AC_CANONICAL_TARGET (weren't
used), renaming configure.in to configure.ac (required for automake
1.13 coming up), moving automake options to configure.ac (removes use
of AM_INIT_AUTOMAKE with two parameters, which is also gone with
automake 1.13).

Also remove empty files and declare the system foreign, not gnu (NEWS
and AUTHORS are not used), avoid re-declaring in the distributed files
the conditional sources (automake takes care of that), and don't use
-Werror (as it would fail to build with GCC 4.6 and 4.7).

Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.eu>

Makefile.am

@@ -1,6 +1,4 @@
-AM_CFLAGS = -Wall -Werror
-
-AUTOMAKE_OPTIONS = gnu
+AM_CFLAGS = -Wall
 
 bin_PROGRAMS = sam7
 
@@ -22,6 +20,5 @@ endif
 noinst_HEADERS = io.h samba.h cmd.h loader128_data.h loader256_data.h 
 
 EXTRA_DIST = driver/Makefile driver/at91.c \
-	io_win32.c io_posix.c io_iokit.c io_libusb.c\
 	loader/Makefile loader/at91.h loader/bin2c.c loader/crt0.S \
-	loader/loader.c loader/loader.lds
+	loader/loader.c loader/loader.lds

configure.ac

@@ -1,13 +1,10 @@
 AC_INIT([sam7utils], [0.2.1], [konkers@konkers.net])
 
-AC_CANONICAL_BUILD
 AC_CANONICAL_HOST
-AC_CANONICAL_TARGET
 
-AM_INIT_AUTOMAKE(sam7utils,0.2.1)
+AM_INIT_AUTOMAKE(foreign)
 AM_CONFIG_HEADER(config.h)
 
-
 AC_PROG_CC 
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET