doc: Fix typos in autoconf example

Reported by nick black <dankamongmen@gmail.com>

diff --git a/doc/core.txt b/doc/core.txt
index c10cbc07b033d6dd243eaaec37bf51dee5eebbdd..1bc5a74aeaedbe040d53f6b898400c66f812bd23 100644 (file)
--- a/doc/core.txt
+++ b/doc/core.txt
@@ -70,8 +70,8 @@ required to link against the library.
 ----
 PKG_CHECK_MODULES(LIBNL3, libnl-3.0 >= 3.1, [have_libnl3=yes], [have_libnl3=no])
 if (test "${have_libnl3}" = "yes"); then
-       CFLAGS += "$LIBNL3_CFLAGS"
-       LIBS += "$LIBNL3_LIBS"
+       CFLAGS="$LIBNL3_CFLAGS"
+       LIBS="$LIBNL3_LIBS"
 fi
 ----