autotools: Install headers

Use the _HEADERS automake variables to install headers appropriately.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
diff --git a/Makefile.am b/Makefile.am
index b14f3d2..ed2d4dd 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,14 +2,17 @@
 
 lib_LTLIBRARIES = libmctp.la
 libmctp_la_SOURCES = core.c alloc.c log.c \
-		     libmctp.h libmctp-alloc.h libmctp-log.h
+		     libmctp-alloc.h libmctp-log.h
+include_HEADERS = libmctp.h
 
 if LIBMCTP_BINDING_serial
-libmctp_la_SOURCES += serial.c libmctp-serial.h
+libmctp_la_SOURCES += serial.c
+include_HEADERS += libmctp-serial.h
 endif
 
 if LIBMCTP_BINDING_astlpc
-libmctp_la_SOURCES += astlpc.c libmctp-astlpc.h
+libmctp_la_SOURCES += astlpc.c
+include_HEADERS += libmctp-astlpc.h
 endif
 
 bin_PROGRAMS = utils/mctp-demux-daemon
diff --git a/libmctp-astlpc.h b/libmctp-astlpc.h
index 4592e75..4bffd93 100644
--- a/libmctp-astlpc.h
+++ b/libmctp-astlpc.h
@@ -7,7 +7,7 @@
 extern "C" {
 #endif
 
-#include "libmctp.h"
+#include <libmctp.h>
 
 struct mctp_binding_astlpc;
 
diff --git a/libmctp-serial.h b/libmctp-serial.h
index 8684950..994173d 100644
--- a/libmctp-serial.h
+++ b/libmctp-serial.h
@@ -7,7 +7,7 @@
 extern "C" {
 #endif
 
-#include "libmctp.h"
+#include <libmctp.h>
 
 struct mctp_binding_serial;