Update to mmtk-core 0.2.0 (#40)

Author: qinsoon

mmtk/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mmtk_openjdk"
-version = "0.1.0"
+version = "0.2.0"
 authors = [" <>"]
 
 [lib]
@@ -21,7 +21,7 @@ lazy_static = "1.1"
 # - change branch
 # - change repo name
 # But other changes including adding/removing whitespaces in commented lines may break the CI.
-mmtk = { git = "ssh://[email protected]/mmtk/mmtk-core.git", rev = "f9ebe772b12ea4654dfbe31605b3fa8fc5b6893b" }
+mmtk = { git = "ssh://[email protected]/mmtk/mmtk-core.git", rev = "390354e8c89b064b4c78f5e5c7445a35ed8b63d4" }
 # Uncomment the following to build locally
 # mmtk = { path = "../repos/mmtk-core" }