Consistenly format variables in */Makefile.am files
Change-Id: Ifa21513c007072314097b7bec188579972dc1694
diff --git a/openbsc/Makefile.am b/openbsc/Makefile.am
index 8696eb4..f7eda56 100644
--- a/openbsc/Makefile.am
+++ b/openbsc/Makefile.am
@@ -1,7 +1,16 @@
AUTOMAKE_OPTIONS = foreign dist-bzip2 1.6
-AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include
-SUBDIRS = doc include src tests
+AM_CPPFLAGS = \
+ $(all_includes) \
+ -I$(top_srcdir)/include \
+ $(NULL)
+
+SUBDIRS = \
+ doc \
+ include \
+ src \
+ tests \
+ $(NULL)
pkgconfigdir = $(libdir)/pkgconfig
pkgconfig_DATA = openbsc.pc