Test: Added 'TestBufferOverrun4'

testbufferoverrun4/err.msg

@@ -0,0 +1 @@
+[testbufferoverrun4\testbufferoverrun4.cpp:6]: Buffer overrun

testbufferoverrun4/testbufferoverrun4.cpp

@@ -0,0 +1,7 @@
+
+
+void f()
+{
+    char str[3];
+    strcpy(str, "abc");
+}