Fix some genbuiltins ROM const-losing cast warns
Fix some genbuiltins ROM const-losing cast warns

Use DUK_LOSE_CONST() helper macro to lose 'const'.

svaarala/duktape,jmptrader/duktape,markand/duktape,markand/duktape,harold-b/duktape,jmptrader/duktape,svaarala/duktape,svaarala/duktape,svaarala/duktape,markand/duktape,harold-b/duktape,jmptrader/duktape,jmptrader/duktape,svaarala/duktape,jmptrader/duktape,svaarala/duktape,svaarala/duktape,markand/duktape,markand/duktape,harold-b/duktape,jmptrader/duktape,harold-b/duktape,harold-b/duktape,svaarala/duktape,harold-b/duktape,markand/duktape,jmptrader/duktape,svaarala/duktape,harold-b/duktape,markand/duktape,harold-b/duktape,harold-b/duktape,jmptrader/duktape,jmptrader/duktape,markand/duktape,markand/duktape,jmptrader/duktape,harold-b/duktape,markand/duktape