Try to bring the required toolsets more in sync with what testers are actually running. Sort required toolsets.

[SVN r40739]

status/explicit-failures-markup.xml

@@ -24,29 +24,22 @@
 
     <!-- /////////////// Toolsets /////////////// -->
     <mark-toolset name="acc" status="required"/>
-    <mark-toolset name="msvc-7.1" status="required"/>
-    <mark-toolset name="msvc-8.0" status="required"/>
-    <mark-toolset name="gcc-mingw-3.4.2" status="required"/>
-    <mark-toolset name="gcc-mingw-3.4.5" status="required"/>
-    <mark-toolset name="gcc-3.3.6" status="required"/>
-    <mark-toolset name="gcc-cygwin-3.4.4" status="required"/>
-    <mark-toolset name="gcc-3.2.3_linux" status="required"/>
-    <mark-toolset name="gcc-3.3.6_linux" status="required"/>
-    <mark-toolset name="gcc-3.4.5_linux" status="required"/>
-    <mark-toolset name="gcc-3.4.5_linux" status="required"/>
-    <mark-toolset name="gcc-4.0.3_linux" status="required"/>
-    <mark-toolset name="gcc-4.1.0_linux" status="required"/>
-    <mark-toolset name="gcc-3.4.5_linux_x86_64" status="required"/>
-    <mark-toolset name="gcc-4.1.0_linux_x86_64" status="required"/>
+    <mark-toolset name="darwin-4.0.1" status="required"/>
+    <mark-toolset name="gcc-3.4.3_sunos" status="required"/>
     <mark-toolset name="gcc-3_4_4_tru64" status="required"/>
+    <mark-toolset name="gcc-4.1.2_sunos_i86pc" status="required"/>
+    <mark-toolset name="gcc-4.1.3_linux" status="required"/>
+    <mark-toolset name="gcc-4.2.1" status="required"/>
+    <mark-toolset name="gcc-4.2.1_linux_x86_64" status="required"/>
     <mark-toolset name="gcc-4_0_3_tru64" status="required"/>
-    <mark-toolset name="gcc-3.4.3_sunos" status="required"/>
-    <mark-toolset name="darwin-4.0.1" status="required"/>
-    <mark-toolset name="intel-vc71-win-9.1" status="required"/>
-    <mark-toolset name="intel-linux-9.0" status="required"/>
+    <mark-toolset name="gcc-cygwin-3.4.4" status="required"/>
+    <mark-toolset name="gcc-mingw-3.4.5" status="required"/>
     <mark-toolset name="hp_cxx-71_006_tru64" status="required"/>
-    <mark-toolset name="sun-5.8" status="required"/>
-    <mark-toolset name="gcc-4.1.2_sunos_i86pc" status="required"/>
+    <mark-toolset name="intel-linux-9.0" status="required"/>
+    <mark-toolset name="intel-vc71-win-9.1" status="required"/>
+    <mark-toolset name="msvc-7.1" status="required"/>
+    <mark-toolset name="msvc-8.0" status="required"/>
+    <mark-toolset name="sun-5.9" status="required"/>
 
     <!-- /////////////// Libraries /////////////// -->