Made Intel on VC8 a required toolset

[SVN r35354]

status/explicit-failures-markup.xml

@@ -48,6 +48,7 @@
     <mark-toolset name="qcc-3.3.5_cpp" status="required"/>
     <mark-toolset name="qcc-3.3.5_gpp" status="required"/>
     <mark-toolset name="intel-vc71-win-9.1" status="required"/>
+    <mark-toolset name="intel-vc8-win-9.1" status="required"/>
     <mark-toolset name="intel-linux-9.0" status="required"/>
     <mark-toolset name="hp_cxx-71_006_tru64" status="required"/>
     <mark-toolset name="sun-5.8" status="required"/>