[Patch libsanitizer] merge rev 182922 (helps running under qemu)

[Christophe Lyon]

Hi,

I'd like to backport libsanitizer commit #182922:
Index: sanitizer_common/sanitizer_linux.cc
===================================================================
--- sanitizer_common/sanitizer_linux.cc    (revision 199453)
+++ sanitizer_common/sanitizer_linux.cc    (working copy)
@@ -410,7 +410,9 @@ bool MemoryMappingLayout::Next(uptr *sta
   CHECK_EQ(*current_++, ' ');
   while (IsDecimal(*current_))
     current_++;
-  CHECK_EQ(*current_++, ' ');
+  // Qemu may lack the trailing space.
+  // http://code.google.com/p/address-sanitizer/issues/detail?id=160
+  // CHECK_EQ(*current_++, ' ');
   // Skip spaces.
   while (current_ < next_line && *current_ == ' ')
     current_++;

It helps handling qemu's output for /proc/self/maps until the
corresponding patch in qemu is available to developers (it has been
accepted, but not part of a release yet).

OK to commit in trunk?

Thanks,

Christophe