[CPP/SAMPLES] Samples location independant on script execution directory (#13251)

samples/cpp/build_samples.sh

@@ -14,7 +14,7 @@ usage() {
     exit 1
 }
 
-samples_type=$(basename "$( dirname "${BASH_SOURCE[0]-$0}" )" )
+samples_type="$(basename "$(dirname "$(realpath "${BASH_SOURCE[0]}")")")"
 build_dir="$HOME/openvino_${samples_type}_samples_build"
 sample_install_dir=""
 
@@ -52,8 +52,7 @@ error() {
 }
 trap 'error ${LINENO}' ERR
 
-SAMPLES_PATH="$( cd "$( dirname "${BASH_SOURCE[0]-$0}" )" && pwd )"
-
+SAMPLES_PATH="$( cd "$( dirname "$(realpath "${BASH_SOURCE[0]}")" )" && pwd )"
 printf "\nSetting environment variables for building samples...\n"
 
 if [ -z "$INTEL_OPENVINO_DIR" ]; then