improve the error message to find out easier which script failed

Author: petrnovota

docs/source/_static/install_depthai.sh

@@ -7,7 +7,7 @@ mkdir "$WORKING_DIR"
 install_path=""
 path_correct="false"
 
-trap 'RET=$? ; echo -e >&2 "\n\x1b[31mFailed installing dependencies. Could be a bug in the installer or unsupported platform. Open a bug report over at https://github.com/luxonis/depthai - exited with status $RET at line $LINENO \x1b[0m\n" ; exit $RET' ERR
+trap 'RET=$? ; echo -e >&2 "\n\x1b[31mFailed installing depthai. Could be a bug in the installer or unsupported platform. Open a bug report over at https://github.com/luxonis/depthai - exited with status $RET at line $LINENO \x1b[0m\n" ; exit $RET' ERR
 
 while [ "$path_correct" = "false" ]
 do