[llvm-rc] Support EXSTYLE statement.

Patch by Jacek Caban!

Differential Revision: https://reviews.llvm.org/D55020

llvm-svn: 347858
diff --git a/llvm/tools/llvm-rc/ResourceScriptParser.h b/llvm/tools/llvm-rc/ResourceScriptParser.h
index 3dd110f..4f047f3 100644
--- a/llvm/tools/llvm-rc/ResourceScriptParser.h
+++ b/llvm/tools/llvm-rc/ResourceScriptParser.h
@@ -172,6 +172,7 @@
   ParseOptionType parseVersionStmt();
   ParseOptionType parseCaptionStmt();
   ParseOptionType parseClassStmt();
+  ParseOptionType parseExStyleStmt();
   ParseOptionType parseFontStmt(OptStmtType DialogType);
   ParseOptionType parseStyleStmt();