Implement more wasm-c-apis and enable Envoy integration (#622)

Implement more wasm-c-api APIs to support Envoy integration:
- sync up with latest c-api definition
- change CMakeLists to export necessary headers and install the static library of iwasm
- enable to export tables and memories
- support memorytype and tabletype APIs
- update wasm-c-api sampels
- enable to export importtype APIs

And refine bazel scripts for sample XNNPACK workload, add license headers for sample simple.

Signed-off-by: Wenyong Huang <wenyong.huang@intel.com>

core/iwasm/interpreter/wasm_interp_classic.c

@@ -3417,21 +3417,18 @@ wasm_interp_call_wasm(WASMModuleInstance *module_inst,
     if (function->is_import_func) {
 #if WASM_ENABLE_MULTI_MODULE != 0
         if (function->import_module_inst) {
-            LOG_DEBUG("it is a function of a sub module");
             wasm_interp_call_func_import(module_inst, exec_env,
                                          function, frame);
         }
         else
 #endif
         {
-            LOG_DEBUG("it is an native function");
             /* it is a native function */
             wasm_interp_call_func_native(module_inst, exec_env,
                                          function, frame);
         }
     }
     else {
-        LOG_DEBUG("it is a function of the module itself");
         wasm_interp_call_func_bytecode(module_inst, exec_env, function, frame);
     }
 
@@ -3440,13 +3437,6 @@ wasm_interp_call_wasm(WASMModuleInstance *module_inst,
         for (i = 0; i < function->ret_cell_num; i++) {
             argv[i] = *(frame->sp + i - function->ret_cell_num);
         }
-
-        if (function->ret_cell_num) {
-            LOG_DEBUG("first return value argv[0]=%d", argv[0]);
-        }
-        else {
-            LOG_DEBUG("no return value");
-        }
     }
     else {
 #if WASM_ENABLE_DUMP_CALL_STACK != 0