Updating to the latest 1.0.X tag of atlasexternals. To lower the GCC optimisation

level to -O2 in Release mode. Since as discussed in ATLINFR-1642, the default
-O3 setting causes some problems in the q-tests.

Projects/Athena/externals.txt

@@ -5,5 +5,5 @@
 # an "origin/" prefix before it. For tags however this is explicitly
 # forbidden.
 
-AthenaExternalsVersion = 1.0.8
+AthenaExternalsVersion = 1.0.9
 GaudiVersion = v27r1.012

Projects/AthenaP1/externals.txt

@@ -5,5 +5,5 @@
 # an "origin/" prefix before it. For tags however this is explicitly
 # forbidden.
 
-AthenaExternalsVersion = 1.0.8
+AthenaExternalsVersion = 1.0.9
 GaudiVersion = v27r1.012