build-update-package: Added missing "\" in the end of two printf(1)'s

Signed-off-by: Erik Alexandre Pucci <eap08@c3sl.ufpr.br>
Acked-by: Adriano da Luz <al08@c3sl.ufpr.br>
Acked-by: Danilo Kiyoshi Simizu Yorinori <danilok@c3sl.ufpr.br>

build-update-package

@@ -72,15 +72,15 @@ cd "${AGENTDIR}"
 printf "Checking SEED2-run files integrity... "
 
 if ! test -d "${MD5DIR}"; then
-    printf "ERROR (5): There is no MD5 directory. Please, run create %b"
+    printf "ERROR (5): There is no MD5 directory. Please, run create %b" \
            "integrity.\n"
     exit 5
 fi
 
 for FILE in $(find "${MD5DIR}" -type f); do
     if ! check_file_integrity "${FILE}"; then
-        printf "ERROR (3): File(s) corrupted. Please, re-create integrity or %b"
-               "rebuild the agent files.\n"
+        printf "ERROR (3): File(s) corrupted. Please, re-create integrity %b" \
+               "or rebuild the agent files.\n"
         exit 3
     fi
 done