8034812: remove IDX_INIT macro hack in Node class
Summary: The IDX_INIT macro used by Node::Node(...) to retrieve the Compile object is removed and replaced by a call to Compile::current(). The Node constructor, new operator and all calls to it are adapted accordingly.
Reviewed-by: kvn, jrose, iveresov, goetz
[box2d] Compiled OK
[code-load] Compiled OK
[crypto] Compiled OK
[deltablue] Compiled OK
[earley-boyer] Compiled OK
[gbemu] Compiled OK
[mandreel] Compiled OK
[navier-stokes] Compiled OK
[pdfjs] Compiled OK
[raytrace] Compiled OK
[regexp] Compiled OK
[richards] Compiled OK
[splay] Compiled OK
[typescript] Compiled OK