Added const qualifier for the strings
diff --git a/contiki/apps/http-strings.c b/contiki/apps/http-strings.c
index 26cbdd5..e2bfd5a 100644
--- a/contiki/apps/http-strings.c
+++ b/contiki/apps/http-strings.c
@@ -1,36 +1,36 @@
-char http_http[8] =
+const char http_http[8] =
/* "http://" */
{0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f, 0x2f, };
-char http_200[5] =
+const char http_200[5] =
/* "200 " */
{0x32, 0x30, 0x30, 0x20, };
-char http_301[5] =
+const char http_301[5] =
/* "301 " */
{0x33, 0x30, 0x31, 0x20, };
-char http_302[5] =
+const char http_302[5] =
/* "302 " */
{0x33, 0x30, 0x32, 0x20, };
-char http_get[5] =
+const char http_get[5] =
/* "GET " */
{0x47, 0x45, 0x54, 0x20, };
-char http_10[9] =
+const char http_10[9] =
/* "HTTP/1.0" */
{0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x30, };
-char http_11[9] =
+const char http_11[9] =
/* "HTTP/1.1" */
{0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x31, };
-char http_content_type[15] =
+const char http_content_type[15] =
/* "content-type: " */
{0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, };
-char http_texthtml[10] =
+const char http_texthtml[10] =
/* "text/html" */
{0x74, 0x65, 0x78, 0x74, 0x2f, 0x68, 0x74, 0x6d, 0x6c, };
-char http_location[11] =
+const char http_location[11] =
/* "location: " */
{0x6c, 0x6f, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x3a, 0x20, };
-char http_host[7] =
+const char http_host[7] =
/* "host: " */
{0x68, 0x6f, 0x73, 0x74, 0x3a, 0x20, };
-char http_crnl[3] =
+const char http_crnl[3] =
/* "\r\n" */
{0xd, 0xa, };