libril: fix a syntax error

The trivial error was hidden since RILC_LOG is disabled.

Change-Id: Ie25fecedb2e8f27da7f19d35ccc4dd1f250cfd9c
Signed-off-by: Chih-Wei Huang <cwhuang@linux.org.tw>
diff --git a/libril/ril.cpp b/libril/ril.cpp
index 382a526..425b1b7 100644
--- a/libril/ril.cpp
+++ b/libril/ril.cpp
@@ -2026,7 +2026,7 @@
 
     startRequest;
     appendPrintBuf("%s [version:%d, session:%d, phase:%d, rat:%d, \
-            logicalModemUuid:%s, status:%d", printBuf, rc.version, rc.session
+            logicalModemUuid:%s, status:%d", printBuf, rc.version, rc.session,
             rc.phase, rc.rat, rc.logicalModemUuid, rc.session);
 
     closeRequest;