Added two new tests that demonstrate that goto-cc correctly reports an error when a symbol ambiguity due to static arises.

Author: NlightNFotis

regression/ansi-c/static2/main.c

@@ -0,0 +1,4 @@
+int foo(int a)
+{
+  return a+1;
+}

regression/ansi-c/static2/main2.c

@@ -0,0 +1,4 @@
+static int foo(int a)
+{
+  return a+1;
+}

regression/ansi-c/static2/test.desc

@@ -0,0 +1,6 @@
+CORE
+main.c
+main2.c --function foo
+^main symbol `foo' is ambiguous$
+--
+^warning: ignoring

regression/ansi-c/static3/main.c

@@ -0,0 +1,4 @@
+static int foo(int a)
+{
+  return a+1;
+}

regression/ansi-c/static3/main2.c

@@ -0,0 +1,4 @@
+static int foo(int a)
+{
+  return a+1;
+}

regression/ansi-c/static3/test.desc

@@ -0,0 +1,6 @@
+CORE
+main.c
+main2.c --function foo
+^main symbol `foo' is ambiguous$
+--
+^warning: ignoring