Update install instructions.

git-svn-id: http://llvm-lua.googlecode.com/svn/trunk@135 f87b780f-1855-0410-a4d3-fd11cda3f415

Author: [email protected]

README.llvm-lua

@@ -8,9 +8,9 @@ README for llvm-lua
  * mkdir build
  * cd build
  for Release build:
- * cmake .. -DCMAKE_BUILD_TYPE=Release
+ * cmake .. -DLLVM_PATH=<path to llvm+clan> -DCMAKE_BUILD_TYPE=Release
  for Debug build:
- * cmake .. -DCMAKE_BUILD_TYPE=Debug
+ * cmake .. -DLLVM_PATH=<path to llvm+clan> -DCMAKE_BUILD_TYPE=Debug
  * make
 
 === Install ===