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/IR/IRBuilder.cpp b/llvm/lib/IR/IRBuilder.cpp
index 485b621..71bdc35 100644
--- a/llvm/lib/IR/IRBuilder.cpp
+++ b/llvm/lib/IR/IRBuilder.cpp
@@ -389,7 +389,7 @@
   return createCallHelper(FnAssume, Ops, this);
 }
 
-/// \brief Create a call to a Masked Load intrinsic.
+/// Create a call to a Masked Load intrinsic.
 /// \p Ptr      - base pointer for the load
 /// \p Align    - alignment of the source location
 /// \p Mask     - vector of booleans which indicates what vector lanes should
@@ -412,7 +412,7 @@
                                OverloadedTypes, Name);
 }
 
-/// \brief Create a call to a Masked Store intrinsic.
+/// Create a call to a Masked Store intrinsic.
 /// \p Val   - data to be stored,
 /// \p Ptr   - base pointer for the store
 /// \p Align - alignment of the destination location
@@ -441,7 +441,7 @@
   return createCallHelper(TheFn, Ops, this, Name);
 }
 
-/// \brief Create a call to a Masked Gather intrinsic.
+/// Create a call to a Masked Gather intrinsic.
 /// \p Ptrs     - vector of pointers for loading
 /// \p Align    - alignment for one element
 /// \p Mask     - vector of booleans which indicates what vector lanes should
@@ -473,7 +473,7 @@
                                Name);
 }
 
-/// \brief Create a call to a Masked Scatter intrinsic.
+/// Create a call to a Masked Scatter intrinsic.
 /// \p Data  - data to be stored,
 /// \p Ptrs  - the vector of pointers, where the \p Data elements should be
 ///            stored