Fix issues reported by Coverity (#2681)

Fix multi-module issues and gui sample issues reported by Coverity.
And refine the build script of go language-binding sample.

language-bindings/go/samples/build.sh

@@ -3,19 +3,11 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-PLATFORM=$(uname -s | tr A-Z a-z)
 CUR_DIR=$PWD
-WAMR_DIR=$PWD/../../..
-WAMR_GO_DIR=$PWD/../wamr
 
-cp -a ${WAMR_DIR}/core/iwasm/include/*.h ${WAMR_GO_DIR}/packaged/include
-
-mkdir -p build && cd build
-cmake ${WAMR_DIR}/product-mini/platforms/${PLATFORM} \
-    -DWAMR_BUILD_LIB_PTHREAD=1 -DWAMR_BUILD_DUMP_CALL_STACK=1 \
-    -DWAMR_BUILD_MEMORY_PROFILING=1
-make -j ${nproc}
-cp -a libvmlib.a ${WAMR_GO_DIR}/packaged/lib/${PLATFORM}-amd64
+pushd ${CUR_DIR}/.. > /dev/null 2>&1
+./build.sh
+popd > /dev/null 2>& 1
 
 cd ${CUR_DIR}
 rm -f test