move Runtime.freeMemory and totalMemory to builtin.cpp

This allows them to be shared between the Avian and Android class
library builds.

This commit also disables the URL test in Misc.java on Android, since
it's known to fail, and we still want to know whether the other tests
pass.

src/builtin.cpp

@@ -302,6 +302,20 @@ Avian_java_lang_Runtime_exit
   t->m->system->exit(arguments[1]);
 }
 
+extern "C" AVIAN_EXPORT int64_t JNICALL
+Avian_java_lang_Runtime_freeMemory
+(Thread* t, object, uintptr_t*)
+{
+  return t->m->heap->remaining();
+}
+
+extern "C" AVIAN_EXPORT int64_t JNICALL
+Avian_java_lang_Runtime_totalMemory
+(Thread* t, object, uintptr_t*)
+{
+  return t->m->heap->limit();
+}
+
 extern "C" AVIAN_EXPORT int64_t JNICALL
 Avian_avian_avianvmresource_Handler_00024ResourceInputStream_getContentLength
 (Thread* t, object, uintptr_t* arguments)

src/classpath-avian.cpp

@@ -571,20 +571,6 @@ Avian_java_lang_Runtime_gc
   collect(t, Heap::MajorCollection);
 }
 
-extern "C" AVIAN_EXPORT int64_t JNICALL
-Avian_java_lang_Runtime_freeMemory
-(Thread* t, object, uintptr_t*)
-{
-  return t->m->heap->remaining();
-}
-
-extern "C" AVIAN_EXPORT int64_t JNICALL
-Avian_java_lang_Runtime_totalMemory
-(Thread* t, object, uintptr_t*)
-{
-  return t->m->heap->limit();
-}
-
 extern "C" AVIAN_EXPORT void JNICALL
 Avian_java_lang_Runtime_addShutdownHook
 (Thread* t, object, uintptr_t* arguments)

test/Misc.java

@@ -298,8 +298,14 @@ public class Misc {
       throw new RuntimeException(e);
     }
 
-    expect(new URL("http://oss.readytalk.com")
-           .getHost().equals("oss.readytalk.com"));
+    // as of this writing, we don't support URLs on Android, since it
+    // pulls in a third-party library we don't include:
+    if (! "http://www.android.com/".equals
+        (System.getProperty("java.vendor.url")))
+    {
+      expect(new URL("http://oss.readytalk.com")
+             .getHost().equals("oss.readytalk.com"));
+    }
 
     expect(java.util.Arrays.equals
 	   (new byte[] { 0, 0, 0, 0 },
@@ -336,6 +342,9 @@ public class Misc {
 
     expect(System.getProperty("buzzy.buzzy.bim.bam").equals
            ("yippy yappy yin yang"));
+
+    // just test that it's there; don't care what it returns:
+    Runtime.getRuntime().totalMemory();
   }
 
   protected class Protected { }