Fix dump vars.

Now you have to run config.mk instead of envsetup.mk to dump vars in the build system.

Change-Id: I6caaa7eb13dfd55f07303963f6337d51fb126bb9
diff --git a/tools/adbs b/tools/adbs
index 4fb94d5..b571d48 100755
--- a/tools/adbs
+++ b/tools/adbs
@@ -113,7 +113,7 @@
     path = os.environ['ANDROID_PRODUCT_OUT'] + "/symbols"
   except:
     cmd = "CALLED_FROM_SETUP=true BUILD_SYSTEM=build/core " \
-      + "SRC_TARGET_DIR=build/target make -f build/core/envsetup.mk " \
+      + "SRC_TARGET_DIR=build/target make -f build/core/config.mk " \
       + "dumpvar-abs-TARGET_OUT_UNSTRIPPED"
     stream = os.popen(cmd)
     str = stream.read()