Update git submodules

* Update org.eclipse.mylyn from branch 'master'
  to 2a2f56adbd8958291391b613b2d76a522580530b
  - 539252: OOMPH: support 2018-09
    
    Change-Id: Ic2a1f9bf2b255b2c2a6e54e5529b14d6112c3a24
    Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=539252
    Signed-off-by: frank <eclipse@frank-becker.de>
  - 537260: OOMPH set api Baseline to 3.24
    
    Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=537260
    
    Change-Id: I42cc42fbc55f6df7ecebfc8a8316384698da4948
    Signed-off-by: Frank Becker <eclipse@frank-becker.de>
    
diff --git a/org.eclipse.mylyn b/org.eclipse.mylyn
index 4ab8ef2..2a2f56a 160000
--- a/org.eclipse.mylyn
+++ b/org.eclipse.mylyn
@@ -1 +1 @@
-Subproject commit 4ab8ef2d554a5c3bd2c28f5e362b115a98b1f300
+Subproject commit 2a2f56adbd8958291391b613b2d76a522580530b