Remove @brief commands from doxygen comments, too.

This is a follow-up to r331272.

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

https://reviews.llvm.org/D46290

llvm-svn: 331275
diff --git a/llvm/lib/ExecutionEngine/Orc/Core.cpp b/llvm/lib/ExecutionEngine/Orc/Core.cpp
index 602edb0..b2b5347 100644
--- a/llvm/lib/ExecutionEngine/Orc/Core.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/Core.cpp
@@ -708,7 +708,7 @@
 #endif
 }
 
-/// @brief Look up a symbol by searching a list of VSOs.
+/// Look up a symbol by searching a list of VSOs.
 Expected<JITEvaluatedSymbol>
 lookup(const std::vector<VSO *> VSOs, SymbolStringPtr Name,
        MaterializationDispatcher DispatchMaterialization) {
diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/JITSymbol.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/JITSymbol.cpp
index 2b3c00f..18eb0e4 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/JITSymbol.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/JITSymbol.cpp
@@ -48,7 +48,7 @@
   return Flags;
 }
 
-/// @brief Performs lookup by, for each symbol, first calling
+/// Performs lookup by, for each symbol, first calling
 ///        findSymbolInLogicalDylib and if that fails calling
 ///        findSymbol.
 Expected<JITSymbolResolver::LookupResult>
@@ -81,7 +81,7 @@
   return std::move(Result);
 }
 
-/// @brief Performs flags lookup by calling findSymbolInLogicalDylib and
+/// Performs flags lookup by calling findSymbolInLogicalDylib and
 ///        returning the flags value for that symbol.
 Expected<JITSymbolResolver::LookupFlagsResult>
 LegacyJITSymbolResolver::lookupFlags(const LookupSet &Symbols) {
diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
index 0e27e51..4d7cc36 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
@@ -217,7 +217,7 @@
   }
 };
 
-/// @brief Symbol info for RuntimeDyld.
+/// Symbol info for RuntimeDyld.
 class SymbolTableEntry {
 public:
   SymbolTableEntry() = default;