add include path of core_symbol.hpp for abi_tests

Author: larryk85

unittests/abi_tests.cpp

@@ -529,6 +529,7 @@ struct abi_gen_helper {
   bool generate_abi(const char* source, const char* abi, bool opt_sfs=false) {
 
     std::string include_param = std::string("-I") + eosiolib_path;
+    std::string core_sym_include_param = std::string("-I") + core_symbol_path;
     std::string pfr_include_param = std::string("-I") + pfr_include_path;
     std::string boost_include_param = std::string("-I") + boost_include_path;
     std::string stdcpp_include_param = std::string("-I") + eosiolib_path + "/libc++/upstream/include";
@@ -542,7 +543,7 @@ struct abi_gen_helper {
     auto extra_args = std::vector<std::string>{"-fparse-all-comments", "--std=c++14", "--target=wasm32", "-ffreestanding", "-nostdlib",
       "-nostdlibinc", "-fno-threadsafe-statics", "-fno-rtti",  "-fno-exceptions",
       include_param, boost_include_param, stdcpp_include_param,
-      stdc_include_param, pfr_include_param };
+      stdc_include_param, pfr_include_param, core_sym_include_param };
 
     bool res = runToolOnCodeWithArgs(
       new find_eosio_abi_macro_action(contract, actions, ""),

unittests/include/config.hpp.in

@@ -5,6 +5,7 @@
 
 namespace eosio { namespace unittests { namespace config {
    constexpr char eosiolib_path[] = "${CMAKE_CURRENT_SOURCE_DIR}/../contracts";
+   constexpr char core_symbol_path[] = "${CMAKE_BINARY_DIR}/contracts";
    constexpr char pfr_include_path[] = "${CMAKE_CURRENT_SOURCE_DIR}/../externals/magic_get/include";
    constexpr char boost_include_path[] = "${Boost_INCLUDE_DIR}";
 }}}