fix doxygen brief in subzero header files

src/IceCfg.h

Index: src/IceCfg.h
diff --git a/src/IceCfg.h b/src/IceCfg.h
index f88aa5f8240be59e42abc6e9b862273073115f08..980fc02ea9ef73cd9905657d248b9b318847543c 100644
--- a/src/IceCfg.h
+++ b/src/IceCfg.h
@@ -8,8 +8,8 @@
 //===----------------------------------------------------------------------===//
 ///
 /// \file
-/// This file declares the Cfg class, which represents the control flow graph
-/// and the overall per-function compilation context.
+/// \brief Declares the Cfg class, which represents the control flow graph the

[Jim Stichnoth, 2015/12/02 21:50:38]

s/graph the/graph and the/

[rkotlerimgtec, 2015/12/02 23:58:14]

Done.

+/// overall per-function compilation context.
 ///
 //===----------------------------------------------------------------------===//