samples: philosophers: Fix output to allow Renode to pass

The renode simulator prints some log message text in front of each debug
message, which unfortunately causes the tests to fail.  Fix this by
adding a "c:" in front of the part we want to match, and removing the
anchor from the regex.

Signed-off-by: David Brown <[email protected]>

Author: d3zd3z

samples/philosophers/sample.yaml

@@ -8,7 +8,7 @@ common:
     regex:
       # Match the statistics, and make sure that each philosopher has at least 10 (two digits)
       # meals.
-      - "^\\[\\d{2,}, \\d{2,}, \\d{2,}, \\d{2,}, \\d{2,}, \\d{2,}\\]"
+      - "c:\\[\\d{2,}, \\d{2,}, \\d{2,}, \\d{2,}, \\d{2,}, \\d{2,}\\]"
   tags: rust
   filter: CONFIG_RUST_SUPPORTED
 tests:

samples/philosophers/src/lib.rs

@@ -202,7 +202,7 @@ impl Stats {
     }
 
     fn show(&self) {
-        printkln!("{:?}, e:{:?}, t:{:?}", self.count, self.eating, self.thinking);
+        printkln!("c:{:?}, e:{:?}, t:{:?}", self.count, self.eating, self.thinking);
     }
 }