Fix liblog#__security failure

Update pid and gid value after calling setuid()

Bug: 36480230
Test: cts-tradefed run cts -m CtsLiblogTestCases -t liblog#__security_buffer
Change-Id: I707f7c724d64236ec17f2d978c85883a7b4f180f
Merges-In: I707f7c724d64236ec17f2d978c85883a7b4f180f
diff --git a/liblog/tests/liblog_test.cpp b/liblog/tests/liblog_test.cpp
index 0538c4c..70b8a28 100644
--- a/liblog/tests/liblog_test.cpp
+++ b/liblog/tests/liblog_test.cpp
@@ -1984,6 +1984,8 @@
 
   EXPECT_EQ(0, setuid(AID_SYSTEM));  // only one that can read security buffer
 
+  uid = getuid();
+  gid = getgid();
   pid_t pid = getpid();
 
   ASSERT_TRUE(NULL !=