Rename tests/ -> test/ and update internal refs.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/str.c

@@ -0,0 +1,27 @@
+#include "../src/strlite.h"
+
+int main(void)
+{
+	char buf[10];
+	int val;
+
+	val = atonum("42");
+	if (val != 42)
+		return 1;
+
+	if (!string_match("eth1", "eth1234"))
+		return 1;
+
+	if (string_compare("eth1", "eth1234"))
+		return 1;
+
+	if (!string_case_compare("somestring", "SoMeSTRING"))
+		return 1;
+
+	strlcpy(buf, "tooloongstring", sizeof(buf));
+	if (buf[9] == 'r')
+		return 1;
+
+	return 0;
+}
+