Extra. Update compile command for C++ test.

Author: hermanzdosilovic

extra/tests/gtest/lang.properties

@@ -2,6 +2,6 @@ VERSIONS="8.4.0"
 NAME="C++ Test (GCC $VERSION, Google Test 1.8.1)"
 SOURCE_FILE="main.cpp"
 BINARY_FILE="a.out"
-COMPILE_CMD="/usr/bin/g++ $ARGS $SOURCE_FILE -lgtest -lgtest_main -lpthread "
+COMPILE_CMD="/usr/bin/g++ $ARGS $SOURCE_FILE -lgtest -lgtest_main -lpthread"
 RUN_CMD="./$BINARY_FILE $ARGS"
 RUN_CMD_ISOLATE="GTEST_COLOR=no ./$BINARY_FILE $ARGS"