Log Message:
nim: Update to 1.4.4

Changelog:
Bugfixes since 1.4.2

    Fixed "-d:fulldebug switch does not compile with gc:arc" (#16214)
    Fixed "Strange behavior when calling into Nim" (#16249)
    Fixed "VC++ winnt.h fatal error "No Target Architecture" in \ 
stdlib_io." (#14259)
    Fixed "osLastError may randomly raise defect and crash" (#16359)
    Fixed "& shows as & in docs" (#16364)
    Fixed "gc:arc - SIGSEGV for rawAlloc on windows" (#16365)
    Fixed "generic importc proc's don't work (breaking lots of vmops procs \ 
for js)" (#16428)
    Fixed "[ARC] Compiler error with a closure proc in a macro " (#15043)
    Fixed "genericAssignAux runtime error" (#16706)
    Fixed "Concept: codegen ignores parameter passing" (#16897)
    Fixed "{.push exportc.} interacts with anonymous functions" (#16967)
    Fixed "ARC exports a dangerous 'dispose' proc" (#17003)
    Fixed "Cursor inference leading to corrupt memory with a tuple" \ 
(#17033)
    Fixed "toOpenArray doesn't work in VM; toOpenArray with var openArray \ 
doesn't work in nim js" (#15952)
    Fixed "memory allocation during {.global.} init breaks GC" (#17085)