Driver: Add Tool::ShortName, intended to be a human readable name for the tool.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104416 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tool.cpp b/lib/Driver/Tool.cpp
index 781e0a7..fe01531 100644
--- a/lib/Driver/Tool.cpp
+++ b/lib/Driver/Tool.cpp
@@ -11,8 +11,10 @@
 
 using namespace clang::driver;
 
-Tool::Tool(const char *_Name, const ToolChain &TC) : Name(_Name),
-                                                     TheToolChain(TC) {
+Tool::Tool(const char *_Name, const char *_ShortName,
+           const ToolChain &TC) : Name(_Name), ShortName(_ShortName),
+                                  TheToolChain(TC)
+{
 }
 
 Tool::~Tool() {