build/trivial: prettify makefiles by wrapping long lines

Signed-off-by: Thomas Haller <thaller@redhat.com>
Acked-by: Thomas Graf <tgraf@suug.ch>

src/Makefile.am

@@ -2,7 +2,12 @@
 
 SUBDIRS = lib
 
-AM_CPPFLAGS  = -I${top_srcdir}/include -I${top_builddir}/include -D_GNU_SOURCE -DSYSCONFDIR=\"$(sysconfdir)/libnl\"
+AM_CPPFLAGS  = \
+	-I${top_srcdir}/include \
+	-I${top_builddir}/include \
+	-D_GNU_SOURCE \
+	-DSYSCONFDIR=\"$(sysconfdir)/libnl\"
+
 AM_CFLAGS = -Wall
 
 LDADD = \

src/lib/Makefile.am

@@ -1,6 +1,13 @@
 # -*- Makefile -*-
 
-AM_CPPFLAGS  = -I${top_srcdir}/include -I${top_builddir}/include -D_GNU_SOURCE -DPKGLIBDIR=\"$(pkglibdir)\" -DSYSCONFDIR=\"$(sysconfdir)\" -rdynamic
+AM_CPPFLAGS  = \
+	-I${top_srcdir}/include \
+	-I${top_builddir}/include \
+	-D_GNU_SOURCE \
+	-DPKGLIBDIR=\"$(pkglibdir)\" \
+	-DSYSCONFDIR=\"$(sysconfdir)\" \
+	-rdynamic
+
 AM_CFLAGS = -Wall
 AM_LDFLAGS = \
 	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE)

tests/Makefile.am

@@ -5,7 +5,12 @@ EXTRA_DIST = \
 
 if ENABLE_UNIT_TESTS
 
-AM_CPPFLAGS  = -Wall -I${top_srcdir}/include -I${top_builddir}/include -D_GNU_SOURCE -DSYSCONFDIR=\"$(sysconfdir)/libnl\"
+AM_CPPFLAGS = \
+	-Wall \
+	-I${top_srcdir}/include \
+	-I${top_builddir}/include \
+	-D_GNU_SOURCE \
+	-DSYSCONFDIR=\"$(sysconfdir)/libnl\"
 
 LDADD = \
 	${top_builddir}/lib/libnl-3.la \