I don't know if we want to keep this, but this way we can compile clang-hash for run-tests again

src/CMakeLists.txt

@@ -24,3 +24,5 @@ add_library(clang-hash SHARED
   hash-visitor.cc)
 
 SET_TARGET_PROPERTIES(clang-hash PROPERTIES LINK_FLAGS ${LLVM_LDFLAGS})
+
+configure_file(clang-hash.in ${PROJECT_BINARY_DIR}/clang-hash)

src/clang-hash.in

+#!/bin/bash
+
+
+printf -v ARGS "%q " "$@"
+
+${CMAKE_C_COMPILER} -Xclang -load -Xclang ${PROJECT_BINARY_DIR}/src/libclang-hash.so -Xclang -plugin -Xclang hash-unit -fsyntax-only $ARGS