Fix type conversion errors in case of TizenRT.

[rtakacs]

There are some conversion errors when building JerryScript for TizenRT. This patch fixes that.

E.g.

error: conversion to '_Bool8' from 'int' may alter its value [-Werror=conversion]
    return_with_literal &= !PARSER_IS_CLASS_CONSTRUCTOR_SUPER (context_p->status_flags);

[rerobika]

LGTM (informal)

[zherczeg]

LGTM

[LaszloLango]

LGTM

[akosthekiss]

Wouldn't an explicit type cast to bool be a better approach in these cases? almost_bool ? true : false seem strange to me.

A related question: Travis CI is green. Where does the error manifest itself?

[rtakacs]

@akosthekiss There are other ? true : false places in the code and I use that solution for the hotfix. The explicit type conversion indeed looks better.
The conversion errors are found by JSRemoteTest (when building for TizenRT). It is interesting why JerryScript's Travis jobs could not catch these errors.

[zherczeg]

http://port70.net/~nsz/c/c11/n1570.html#6.3.1.2
This should be followed by C compilers. If a compiler complains, it does not follow the standard, so we should be careful.

[akosthekiss]

The referred section of the standard only mandates how a value must be converted to bool, not when. I.e., the standard does not require the compiler to allow implicit conversion from int to bool.