openpower: Fix _appends with missing space

These _appends can potentially crowd their neighboring entries.

Change-Id: I1dae77f9a17744110175916935c01773708652b0
Tested: Built a witherspoon image
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-witherspoon/conf/machine/witherspoon.conf b/meta-witherspoon/conf/machine/witherspoon.conf
index 8fb5c49..806d534 100644
--- a/meta-witherspoon/conf/machine/witherspoon.conf
+++ b/meta-witherspoon/conf/machine/witherspoon.conf
@@ -17,7 +17,7 @@
 PHOSPHOR_MRW_URI = "git://github.com/open-power/witherspoon-xml"
 PHOSPHOR_MRW_REV = "6ca015dbd3e1e9d5206f9ec13ec9db2d8965e181"
 
-DISTRO_FEATURES_append = "\
+DISTRO_FEATURES_append = " \
         obmc-openpower \
         obmc-openpower-extra \
         obmc-openpower-legacy \