Fix embedding of constant ints

Allow 64-bit constants.  not sure how we didn't run into this before

src/codegen/irgen/util.cpp

@@ -99,11 +99,11 @@ llvm::Constant* embedConstantPtr(const void* addr, llvm::Type* type) {
     return ptr_val;
 }
 
-llvm::Constant* getConstantInt(int n, llvm::Type* t) {
+llvm::Constant* getConstantInt(int64_t n, llvm::Type* t) {
     return llvm::ConstantInt::get(t, n);
 }
 
-llvm::Constant* getConstantInt(int n) {
+llvm::Constant* getConstantInt(int64_t n) {
     return getConstantInt(n, g.i64);
 }
 

src/codegen/irgen/util.h

@@ -28,9 +28,9 @@ namespace pyston {
 llvm::Constant* getStringConstantPtr(const std::string& str);
 llvm::Constant* getStringConstantPtr(const char* str);
 llvm::Constant* embedConstantPtr(const void* addr, llvm::Type*);
-llvm::Constant* getConstantInt(int val);
+llvm::Constant* getConstantInt(int64_t val);
 llvm::Constant* getConstantDouble(double val);
-llvm::Constant* getConstantInt(int val, llvm::Type*);
+llvm::Constant* getConstantInt(int64_t val, llvm::Type*);
 
 void dumpPrettyIR(llvm::Function* f);
 }