Repurpose Release_Developer BUILDTYPE and remove SK_DEVELOPER.

tests/RuntimeConfigTest.cpp

Index: tests/RuntimeConfigTest.cpp
diff --git a/tests/RuntimeConfigTest.cpp b/tests/RuntimeConfigTest.cpp
index d40a4f0dd690026d99b1024fb3d75c2adf27f267..b863ee1fd8c224b92375f01da579957b7c53ef5c 100644
--- a/tests/RuntimeConfigTest.cpp
+++ b/tests/RuntimeConfigTest.cpp
@@ -16,12 +16,12 @@ DEF_TEST(RuntimeConfig, reporter) {
     REPORTER_ASSERT(reporter, 1 == c_RTConfTestVariable);
 
     SK_CONF_SET("test.utils.rtconf.testVariable", 2);
-#ifdef SK_DEVELOPER
+#ifdef SK_DEBUG
     REPORTER_ASSERT(reporter, 2 == c_RTConfTestVariable);
-#else  // not SK_DEVELOPER
-    // Can not change RTConf variables in Release.
+#else  // not SK_DEBUG
+    // Can not change RTConf variables in SK_RELEASE.
     REPORTER_ASSERT(reporter, 1 == c_RTConfTestVariable);
-#endif  // SK_DEVELOPER
+#endif  // SK_DEBUG
 
     // This should not give a warning.
     SK_CONF_TRY_SET("test.utils.rtconf.nonexistentVariable", 7);