[PATCH] [lsan] [mips] adding support of lsan for mips64/mips64el arch

[Kumar Sukhani]

> Also, please take note of test/asan/lit.cfg and test/asan/Unit/lit.site.cfg.in. Those configs enable leak detection in ASan tests on x86_64. Please make sure that is the case for MIPS as well.

Thanks, I will submit lsan testing patch separately once this patch is accepted.

================
Comment at: lib/sanitizer_common/sanitizer_linux_libcdep.cc:248
@@ +247,3 @@
+
+  const uptr kTlsTcbOffset = 0x7000;
+  const uptr kTcbHead = 16;
----------------
earthdok wrote:
> kumarsukhani wrote:
> > earthdok wrote:
> > > Only this constant is part of the ABI. kTcbHead and kTlsTcbAlign could theoretically change, so we need to test them as well.
> > > 
> > > Instead of ThreadDescriptorSize(), we probably want to expose TlsPreTcbSize(). But please figure out what the test will look like before making this change.
> > can we use test of minor number, the way x86_64 has done ?
> That's how you guess the size. But you still need a testcase to check that your guess is correct. Take a look at lib/sanitizer_common/tests/sanitizer_linux_test.cc, specifically TEST(SanitizerLinux, ThreadDescriptorSize).
> 
how to run this tests on x86_64 ?
I think so this tests doesn't execute when I run 
```
make check-all
```

http://reviews.llvm.org/D5616