Rename clang-driver to clang.

Again, I tried to update cmake but it is untested.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67606 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/driver/driver.cpp b/tools/driver/driver.cpp
index b227761..d968cc8 100644
--- a/tools/driver/driver.cpp
+++ b/tools/driver/driver.cpp
@@ -95,3 +95,4 @@
 
   return Res;
 }
+