all: adopt .gitignore for new delve binary naming

Signed-off-by: Marcel van Lohuizen <[email protected]>
Change-Id: I46d6677495e3914b1bd9c7e9ca7875e2c117a17e
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1172008
Reviewed-by: Daniel Martí <[email protected]>
TryBot-Result: CUEcueckoo <[email protected]>
Unity-Result: CUE porcuepine <[email protected]>

Author: mpvl

.gitignore

@@ -3,7 +3,7 @@ cmd/cue/cue
 **/*.test
 /dist
 /.unity-bin
-**/__debug_bin
+**/__debug_bin*
 **/.DS_Store
 **/*.exe