versioner: replace availability attributes with annotate.

Major refactor to use __attribute__((annotate)) to be able to keep
track of the semantic differences between __INTRODUCED_IN(x) and
__INTRODUCED_IN_X86(x), for use in the upcoming preprocessor.

Bug: http://b/30170081
Change-Id: I6496a8c40ba7f4553de9a2be0bbddcf37c813937
diff --git a/tools/versioner/tests/missing_api/expected_fail b/tools/versioner/tests/missing_api/expected_fail
index 85c07f5..65a25f2 100644
--- a/tools/versioner/tests/missing_api/expected_fail
+++ b/tools/versioner/tests/missing_api/expected_fail
@@ -1,2 +1,5 @@
 foo: declaration marked available but symbol missing in [arm-12]
+  foo: introduced = 9
+    extern declaration @ headers/foo.h:1:1
+      introduced = 9
 versioner: version check failed