fix doxygen brief in subzero header files

src/IceAssemblerMIPS32.h

Index: src/IceAssemblerMIPS32.h
diff --git a/src/IceAssemblerMIPS32.h b/src/IceAssemblerMIPS32.h
index 1d46b914691f7994559e15afab61598af7337b2e..77a3ee420b1d8e8f0259255df13e8671697f14c6 100644
--- a/src/IceAssemblerMIPS32.h
+++ b/src/IceAssemblerMIPS32.h
@@ -16,7 +16,7 @@
 //===----------------------------------------------------------------------===//
 ///
 /// \file
-/// This file implements the Assembler class for MIPS32.
+/// \brief Implements the Assembler class for MIPS32.

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

Declares, not implements, right?

(For now, I guess it does both, but in the future there will be a .cpp file as
well.)

[rkotlerimgtec, 2015/12/02 23:58:13]

Done.

 ///
 //===----------------------------------------------------------------------===//