trace-cmd: Fix 'make TAGS' that now only adds cpp files

Commit 1926e78eca0c ("trace-cmd: Add C++ files to 'make TAGS'") changed
"make TAGS" to also add cpp files. Unfortunately, it changed the code to
only process cpp files. This fixes that error, so that make TAGS now does
all files for etag processing.

Fixes: 1926e78eca0c ("trace-cmd: Add C++ files to 'make TAGS'")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
1 file changed