Add a number of symbol names to list to make internal after loading builtins.

Fixes issue #131; because they weren't being marked as internal before, when
compiling to multiple targets these would lead to multiply-defined symbols.

builtins.cpp

@@ -311,8 +311,12 @@ lCheckModuleIntrinsics(llvm::Module *module) {
 static void
 lSetInternalFunctions(llvm::Module *module) {
     const char *names[] = {
+        "__add_float",
+        "__add_int32",
+        "__add_uniform_double",
         "__add_uniform_int32",
         "__add_uniform_int64",
+        "__add_varying_double",
         "__add_varying_int32",
         "__add_varying_int64",
         "__aos_to_soa3_float",
@@ -543,6 +547,10 @@ lSetInternalFunctions(llvm::Module *module) {
         "__svml_pow",
         "__undef_uniform",
         "__undef_varying",
+        "__vec4_add_float",
+        "__vec4_add_int32",
+        "__vselect_float",
+        "__vselect_i32",
     };
 
     int count = sizeof(names) / sizeof(names[0]);

expr.cpp

@@ -3157,7 +3157,7 @@ IndexExpr::GetLValue(FunctionEmitContext *ctx) const {
             for (int i = 0; i < count; ++i) {
                 if (indices[i] < 0 || indices[i] >= nElements)
                     Warning(index->pos, "Array index \"%d\" may be out of bounds for "
-                            "\"%d\" element array.", indices[i], nElements);
+                            "%d element array.", indices[i], nElements);
             }
         }
     }