fix relocation of global linkable variables, enable iostream module linking test
mark internal globals as private as well
always do globaldce (and potentially strip-debug), even when we are building something linkable
handle multiple F_BASE_.. in relocation
refactor getIndex calls to include the signature
do not relocate function pointers when no need to (no such table in parent)
emit F_BASE
refactor static link test and add todo
fix f_bases handling in static linker
fix test harness
add function pointers test
remove old comment