marked interprocess library unusable on gcc-4.2.1_hpux_ia64 (until it is ported to HP-UX platform)

[SVN r43014]

status/explicit-failures-markup.xml

@@ -1804,6 +1804,7 @@
             <toolset name="gcc-3.1*"/>
             <toolset name="gcc-3.2*"/>
             <toolset name="gcc-3.3*"/>
+            <toolset name="gcc-4.2.1_hpux_ia64"/>
             <toolset name="mipspro"/>
             <toolset name="acc*"/>
             <toolset name="msvc-8.0~wm5*"/>