Console: Limit buffer size in ConsoleLogFromVM::Write

[chaoticgd]

Description of Changes

The buffer size for lines written to the EE/IOP consoles has been limited to 4096 characters. In addition, consecutive newline characters are no longer eaten.

Rationale behind Changes

Previously it was very easy to accidentally exhaust the host's memory. For example, if you made an infinite loop and forgot the newline character. Since there would be no output it wouldn't be immediately obvious what was wrong either.

Here's a small program that triggers this behaviour:

# ee-gcc exhaustmem.s -o exhaustmem.elf -nostdlib
	.set noat
	.set noreorder
	.set nomacro
	.global _start
_start:
print_loop:
	lui $a0, %hi(format_string)
	addiu $a0, $a0, %lo(format_string)
	addiu $v1, $zero, 117
	syscall
	b print_loop
	nop
	
	.section .rodata
format_string:
	.string "hello world"

Suggested Testing Steps

Here's the above program in its compiled form:
exhaustmem.zip

Since it's been intentionally written to use up lots of memory think twice before running it.

Note that the Qt console window has a similar quirk where it will just keep using more and more memory. This PR doesn't address that issue.

[JordanTheToaster]

This breaks console output from games.

[chaoticgd]

Oh, doh. The newline is a control character.

[knight-ryu12]

probably that need to care if there is /r/n and /n instead to only check for /n