Test for bug in read-back of the pending instantiation list from the PCH file.

From-SVN: r62063

gcc/testsuite/g++.dg/pch/uninst.C

+#include "uninst.H"
+
+template <class Type> void FOO() {   }
+
+int  main() {
+  		FOO<char>(); 			// stage 2 needs this
+		return min<unsigned long>(5, 0);
+}

gcc/testsuite/g++.dg/pch/uninst.Hs

+#include <bits/stl_algobase.h>
+using namespace std;