perf tools: Remove 'perf' from subcmd function and variable names

In preparation for moving exec_cmd.c and run-command.c out of perf and
into a library, remove 'perf' from all the symbol names.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/bc3ee82b40b8f396b644fa49e0f7260ce442635b.1450193761.git.jpoimboe@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/help.c b/tools/perf/util/help.c
index 8e5e0ce..303a347 100644
--- a/tools/perf/util/help.c
+++ b/tools/perf/util/help.c
@@ -155,7 +155,7 @@
 		struct cmdnames *other_cmds)
 {
 	const char *env_path = getenv("PATH");
-	char *exec_path = perf_exec_path();
+	char *exec_path = get_argv_exec_path();
 
 	if (exec_path) {
 		list_commands_in_dir(main_cmds, exec_path, prefix);
@@ -200,7 +200,7 @@
 			longest = other_cmds->names[i]->len;
 
 	if (main_cmds->cnt) {
-		char *exec_path = perf_exec_path();
+		char *exec_path = get_argv_exec_path();
 		printf("available %s in '%s'\n", title, exec_path);
 		printf("----------------");
 		mput_char('-', strlen(title) + strlen(exec_path));