Add a simple test for shared lib ctor/dtors

 -Erik

test/ldso/Makefile

@@ -19,6 +19,7 @@
 TESTDIR=../
 include $(TESTDIR)/Rules.mak
 
+CFLAGS+=--uclibc-ctors
 all: dltest libhowdy.so run
 
 dltest.o: dltest.c

test/ldso/howdy.c

@@ -5,3 +5,15 @@ int howdy(const char *s)
 	return printf("howdy: %s\n", s);
 }
 
+void __attribute__((constructor)) howdy_ctor(void)
+{
+	printf("I am the libhowdy constructor!\n");
+}
+
+void __attribute__((destructor)) howdy_dtor(void)
+{
+	printf("I am the libhowdy destructor!\n");
+}
+
+
+