Change value of LLVM::GlobalValue#global_constant 1/0 to true/false
Add build_with_lto test and fix parameter type mismatch
Add warn on integer param
Change warning message
Add implicit conversion for backward compatibility
Move pass_manager initialization into setup
Add warn on passing integer param to #build_with_lto
Merge pull request #38 from ishikawa/passing-int-to-llvm-bool-param

Convert LLVMBool parameteter/result to Ruby boolean