Print better errors for unusual using void, null and undefined types

[MaxGraey]

1. Currently this cause to "assertion failed" inside compiler:

export function test(x: void): void {}

2. For:

export function test(x: undefined): void {}

Output: "ERROR TS2304: Cannot find name 'undefined'."

3. For:

export function test(x: null): void {}

Output: "ERROR TS1003: Identifier expected."

4. For:

export function test(a: string | undefined): void {}

Output: "ERROR TS1005: 'null' expected." but also "ERROR TS1109: Expression expected." twice after that.