kill stale text-error window by comm too, not just path

selfdrive/ui/text is a shell wrapper that execs ./_text. After exec,
the running process's argv has no path component, so
pkill -f 'selfdrive/ui/text' silently misses it. Add pkill -x _text
alongside the existing path-pattern kills in build_only.sh,
launch_openpilot.sh, and launch_chffrplus.sh.

build_only.sh

@@ -10,8 +10,11 @@ BASEDIR="/data/openpilot"
 # Fix ownership — we edit as root, openpilot builds/runs as comma
 sudo chown -R comma:comma "$BASEDIR"
 
-# Kill stale error displays and any running manager/launch/managed processes
+# Kill stale error displays and any running manager/launch/managed processes.
+# `text` is a shell wrapper that execs `./_text` — after exec the process is named
+# `_text` (no path), so we kill by exact comm in addition to the path pattern.
 pkill -9 -f "selfdrive/ui/text" 2>/dev/null
+pkill -9 -x _text 2>/dev/null
 pkill -9 -f 'launch_openpilot.sh' 2>/dev/null
 pkill -9 -f 'launch_chffrplus.sh' 2>/dev/null
 pkill -9 -f 'python.*manager.py' 2>/dev/null

launch_chffrplus.sh

@@ -79,8 +79,11 @@ function launch {
     agnos_init
   fi
 
-  # CLEARPILOT: kill stale error display from previous build/run
+  # CLEARPILOT: kill stale error display from previous build/run.
+  # `text` is a wrapper that execs ./_text — running process is named _text
+  # with no path, so kill by exact comm too.
   pkill -f "selfdrive/ui/text" 2>/dev/null
+  pkill -x _text 2>/dev/null
 
   # write tmux scrollback to a file
   tmux capture-pane -pq -S-1000 > /tmp/launch_log

launch_openpilot.sh

@@ -13,6 +13,9 @@ pkill -9 -f 'selfdrive\.' 2>/dev/null
 pkill -9 -f 'system\.' 2>/dev/null
 pkill -9 -f './ui' 2>/dev/null
 pkill -9 -f 'selfdrive/ui/text' 2>/dev/null
+# `text` is a shell wrapper that execs `./_text` — after exec the running
+# process's argv has no path, so kill by exact comm too.
+pkill -9 -x _text 2>/dev/null
 sleep 1
 
 # CLEARPILOT: ensure params persistence dir is owned by comma:comma. Editing