Remove \brief commands from doxygen comments.

We've been running doxygen with the autobrief option for a couple of
years now. This makes the \brief markers into our comments
redundant. Since they are a visual distraction and we don't want to
encourage more \brief markers in new code either, this patch removes
them all.

Patch produced by

  for i in $(git grep -l '\\brief'); do perl -pi -e 's/\\brief //g' $i & done

Differential Revision: https://reviews.llvm.org/D46290

llvm-svn: 331272
diff --git a/llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp b/llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
index 55bdda3..7506174 100644
--- a/llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
@@ -121,7 +121,7 @@
 
 namespace {
 
-/// \brief An instrumentation pass implementing detection of addressability bugs
+/// An instrumentation pass implementing detection of addressability bugs
 /// using tagged pointers.
 class HWAddressSanitizer : public FunctionPass {
 public:
@@ -223,7 +223,7 @@
   return new HWAddressSanitizer(CompileKernel, Recover);
 }
 
-/// \brief Module-level initialization.
+/// Module-level initialization.
 ///
 /// inserts a call to __hwasan_init to the module's constructor list.
 bool HWAddressSanitizer::doInitialization(Module &M) {