liblog: logprint add uid format modifier

Bug: 25996918
Change-Id: Idff5e080fc5c7b69e0c45d3f596eb9d632451cbd
diff --git a/logcat/logcat.cpp b/logcat/logcat.cpp
index 059916e..32bfd9c 100644
--- a/logcat/logcat.cpp
+++ b/logcat/logcat.cpp
@@ -265,7 +265,7 @@
                     "  -v <format>     Sets the log print format, where <format> is:\n"
                     "  --format=<format>\n"
                     "                      brief color epoch long monotonic printable process raw\n"
-                    "                      tag thread threadtime time usec UTC year zone\n\n"
+                    "                      tag thread threadtime time uid usec UTC year zone\n\n"
                     "  -D              print dividers between each log buffer\n"
                     "  --dividers\n"
                     "  -c              clear (flush) the entire log and exit\n"