Bug 1393498 Mark the stub_BaseThreadInitThunk as MOZ_NORETURN to silence a warning about a noreturn function not returning r=dmajor

/home/worker/workspace/build/src/mozglue/build/WindowsDllBlocklist.cpp:816:1: error: 'noreturn' function does return [-Werror]

MozReview-Commit-ID: SYgPDW0sMV

--HG--
extra : rebase_source : d932e84ff0729b1c5ccff6658ee81849eb27eef4

mozglue/build/WindowsDllBlocklist.cpp

@@ -301,7 +301,7 @@ printf_stderr(const char *fmt, ...)
 
 #ifdef _M_IX86
 typedef void (__fastcall* BaseThreadInitThunk_func)(BOOL aIsInitialThread, void* aStartAddress, void* aThreadParam);
-static BaseThreadInitThunk_func stub_BaseThreadInitThunk = nullptr;
+static MOZ_NORETURN BaseThreadInitThunk_func stub_BaseThreadInitThunk = nullptr;
 #endif
 
 typedef NTSTATUS (NTAPI *LdrLoadDll_func) (PWCHAR filePath, PULONG flags, PUNICODE_STRING moduleFileName, PHANDLE handle);