Fixed the samples to build outside the source tree.

Removed redundant _SOURCES lines.

example/simple/Makefile.am

@@ -10,34 +10,6 @@ noinst_PROGRAMS = ssh2 \
 		sftp_RW_nonblock \
 		sftpdir sftpdir_nonblock
 
-INCLUDES = -I$(top_srcdir)/include
+INCLUDES = -I. -I$(top_srcdir)/include
 LDADD = $(top_builddir)/src/libssh2.la
 
-ssh2_SOURCES = ssh2.c
-
-scp_SOURCES = scp.c
-
-scp_nonblock_SOURCES = scp_nonblock.c
-
-scp_write_SOURCES = scp_write.c
-
-scp_write_nonblock_SOURCES = scp_write_nonblock.c
-
-sftp_SOURCES = sftp.c
-
-sftp_nonblock_SOURCES = sftp_nonblock.c
-
-sftp_write_SOURCES = sftp_write.c
-
-sftp_write_nonblock_SOURCES = sftp_write_nonblock.c
-
-sftp_mkdir_SOURCES = sftp_mkdir.c
-
-sftp_mkdir_nonblock_SOURCES = sftp_mkdir_nonblock.c
-
-sftpdir_SOURCES = sftpdir.c
-
-sftpdir_nonblock_SOURCES = sftpdir_nonblock.c
-
-sftp_RW_nonblock_SOURCES = sftp_RW_nonblock.c
-