[analyzer] Taint: add system and popen as undesirable sinks for taint
data.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148176 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/taint-generic.c b/test/Analysis/taint-generic.c
index 5423d05..0f89966 100644
--- a/test/Analysis/taint-generic.c
+++ b/test/Analysis/taint-generic.c
@@ -90,3 +90,11 @@
   strncpy(sncpy, s, 20);
   setproctitle(sncpy, 3); // expected-warning {{Uncontrolled Format String}}
 }
+
+int system(const char *command);
+void testTaintSystemCall() {
+  char buffer[156];
+  char addr[128];
+  scanf("%s", addr);
+  system(addr); // expected-warning {{Tainted data passed to a system call}}
+}