fsmonitor: flag msc_stdint as no-check-code

I'd rather not modify code that we're vendoring, so I'm just marking
it this way.

hgext/fsmonitor/pywatchman/msc_stdint.h

@@ -1,3 +1,4 b''
+// no-check-code
 // ISO C9x  compliant stdint.h for Microsoft Visual Studio
 // Based on ISO/IEC 9899:TC2 Committee draft (May 6, 2005) WG14/N1124 
 // 

tests/test-check-code.t

@@ -11,6 +11,7 b' New errors are not allowed. Warnings are'
   Skipping hgext/fsmonitor/pywatchman/__init__.py it has no-che?k-code (glob)
   Skipping hgext/fsmonitor/pywatchman/bser.c it has no-che?k-code (glob)
   Skipping hgext/fsmonitor/pywatchman/capabilities.py it has no-che?k-code (glob)
+  Skipping hgext/fsmonitor/pywatchman/msc_stdint.h it has no-che?k-code (glob)
   Skipping hgext/fsmonitor/pywatchman/pybser.py it has no-che?k-code (glob)
   Skipping i18n/polib.py it has no-che?k-code (glob)
   Skipping mercurial/httpclient/__init__.py it has no-che?k-code (glob)