kernel: add second example kext for dependency test

kexts/hello-world/extension.yaml

@@ -6,4 +6,4 @@ id: net.doorstuck.socks.hello-world
 license: BSD-3-Clause
 copyright: Copyright © Max Wash 2023
 sources:
-  - hello-world.c
+  - main.c

kexts/hello-world/main.c

@@ -1,7 +1,7 @@
 #include <socks/printk.h>
 #include <socks/kext.h>
 
-kern_status_t online(struct kext *self)
+static kern_status_t online(struct kext *self)
 {
 	printk("Hello, world!");
 	return KERN_OK;
@@ -9,4 +9,4 @@ kern_status_t online(struct kext *self)
 
 DEFINE_KEXT("net.doorstuck.socks.hello-world",
 	    online, NULL,
-	    "net.doorstuck.socks-kernel");
+	    "net.doorstuck.socks.test-base");

kexts/test-base/extension.yaml

@@ -0,0 +1,9 @@
+name: test-base
+description: |
+  A sample kernel extension, demonstrating the structure of a kext.
+  No actual functionality.
+id: net.doorstuck.socks.test-base
+license: BSD-3-Clause
+copyright: Copyright © Max Wash 2023
+sources:
+  - main.c

kexts/test-base/main.c

@@ -0,0 +1,12 @@
+#include <socks/printk.h>
+#include <socks/kext.h>
+
+static kern_status_t online(struct kext *self)
+{
+	printk("Kernel extension base online");
+	return KERN_OK;
+}
+
+DEFINE_KEXT("net.doorstuck.socks.test-base",
+	    online, NULL,
+	    KEXT_NO_DEPENDENCIES);