tests: Ignore src/test/debuginfo/rc_arc.rs on Windows
tests: Ignore src/test/debuginfo/rc_arc.rs on Windows

It requires loading pretty-printers, but GDB doesn't load them on Windows

graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust