[lldb] Color the current PC marker

[JDevlieghere]

Summary

Highlight the current PC marker. D75070 does the same thing but for source listings.

[teemperor]

This is the best patch I have seen since I started working on LLVM

[clayborg]

In D75070 I commented that we might want to allow users to change the ${current-pc-arrow} as a string. It is hard coded to "->", though with all the terminal codes, it might be nice to let this be a setting.

lldb/source/Core/CoreProperties.td

 
 let Definition = "debugger" in {
   def AutoConfirm: Property<"auto-confirm", "Boolean">,
     Global,
     DefaultFalse,
     Desc<"If true all confirmation prompts will receive their default reply.">;
   def DisassemblyFormat: Property<"disassembly-format", "FormatEntity">,
     Global,
-    DefaultStringValue<"{${function.initial-function}{${module.file.basename}`}{${function.name-without-args}}:\\\\n}{${function.changed}\\\\n{${module.file.basename}`}{${function.name-without-args}}:\\\\n}{${current-pc-arrow} }${addr-file-or-load}{ <${function.concrete-only-addr-offset-no-padding}>}: ">,
+    DefaultStringValue<"{${function.initial-function}{${module.file.basename}`}{${function.name-without-args}}:\\\\n}{${function.changed}\\\\n{${module.file.basename}`}{${function.name-without-args}}:\\\\n}{${ansi.fg.yellow}${current-pc-arrow}${ansi.normal} }${addr-file-or-load}{ <${function.concrete-only-addr-offset-no-padding}>}: ">,
     Desc<"The default disassembly format string to use when disassembling instruction sequences.">;
   def FrameFormat: Property<"frame-format", "FormatEntity">,
     Global,
     DefaultStringValue<"frame #${frame.index}: ${ansi.fg.yellow}${frame.pc}${ansi.normal}{ ${module.file.basename}{`${function.name-with-args}{${frame.no-debug}${function.pc-offset}}}}{ at ${ansi.fg.cyan}${line.file.basename}${ansi.normal}:${ansi.fg.yellow}${line.number}${ansi.normal}{:${ansi.fg.yellow}${line.column}${ansi.normal}}}{${function.is-optimized} [opt]}{${frame.is-artificial} [artificial]}\\\\n">,
     Desc<"The default frame format string to use when displaying stack frame information for threads.">;
   def NotiftVoid: Property<"notify-void", "Boolean">,
     Global,
     DefaultFalse,