[m-rev.] for post-commit review: add a NEWS section for 20.01.2

[Julien Fischer]

Add a NEWS section for 20.01.2.

NEWS:
     As above.

Julien.

diff --git a/NEWS b/NEWS
index 5661f39..8f0971f 100644
--- a/NEWS
+++ b/NEWS
@@ -230,6 +230,14 @@ Changes to the Mercury implementation
    Another consequence is that the `--trail-size` and `--trail-size-kwords`
    runtime options no longer have any effect, and are deprecated.

+NEWS for Mercury 20.01.2
+========================
+
+This is a bug-fix release.
+
+* We have a fixed bug that prevented the runtime from building correctly
+  in C grades on 32-bit platforms when *not* using GCC as the C compiler.
+
  NEWS for Mercury 20.01.1
  ========================