ibm: phosphor-image: minor style fix

Wrap lines at 80 characters.

(From meta-ibm rev: 4812cdae9c34b64404aa7a27e858c061be52cf38)

Change-Id: I2cc7013bbd22bc68da438c27abc7f2c87d0734cf
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-ibm/recipes-phosphor/image/obmc-phosphor-image.bbappend b/meta-ibm/recipes-phosphor/image/obmc-phosphor-image.bbappend
index 7beefd6..fd9e3cf 100644
--- a/meta-ibm/recipes-phosphor/image/obmc-phosphor-image.bbappend
+++ b/meta-ibm/recipes-phosphor/image/obmc-phosphor-image.bbappend
@@ -1 +1,4 @@
-OBMC_IMAGE_EXTRA_INSTALL_append = " phosphor-nginx-cert-config phosphor-nslcd-cert-config"
+OBMC_IMAGE_EXTRA_INSTALL_append = "\
+    phosphor-nginx-cert-config \
+    phosphor-nslcd-cert-config \
+    "