Update firmware version to v2.4

Created by: ronald-cron-arm

Update firmware version to v2.4 and update the readme file accordingly.

Change-Id: Id619c1e0efa513a96c6c5ab6038ee1b76c0ad70d Signed-off-by: Ronald Cron ronald.cron@arm.com

framework/test/test_version.c

@@ -14,13 +14,13 @@
 static void test_version(void)
 {
     assert(BUILD_VERSION_MAJOR == 2);
-    assert(BUILD_VERSION_MINOR == 3);
+    assert(BUILD_VERSION_MINOR == 4);
     assert(BUILD_VERSION_PATCH == 0);
 }
 
 static void test_version_string(void)
 {
-    const char *result_string = "v2.3.0";
+    const char *result_string = "v2.4.0";
 
     assert(strcmp(BUILD_VERSION_STRING, result_string) == 0);
 }