Fix build with GCC11
LCG101 uses gcc11, which now requires to explicitly include some STL headers, see https://www.gnu.org/software/gcc/gcc-11/porting_to.html#header-dep-changes
LCG101 uses gcc11, which now requires to explicitly include some STL headers, see https://www.gnu.org/software/gcc/gcc-11/porting_to.html#header-dep-changes