tlbuild: --enable-cxx-runtime-hack

 
 7.1.6 '--enable-cxx-runtime-hack'
 ---------------------------------
 
 If enabled (as it is for the native TL build), when using 'g++', try to
 statically link with 'libstdc++', thus improving portability of the
 resulting binary.  ⇒Macros for compilers.