perf build: Fix shellcheck issue about quotes for check-headers.sh

Running shellcheck on check-headers.sh generates below warning:

In check-headers.sh line 126:
  check_2 "tools/$file" "$file" $*
                                ^-- SC2048 (warning): Use "$@" (with quotes) to prevent whitespace problems.

In check-headers.sh line 134:
  check_2 "tools/perf/trace/beauty/$file" "$file" $*
                                                  ^-- SC2048 (warning): Use "$@" (with quotes) to prevent whitespace problems.

In check-headers.sh line 186:
cd tools/perf
^-----------^ SC2164 (warning): Use 'cd ... || exit' or 'cd ... || return' in case cd fails.

Fixed the warnings by:
- Using "$@" instead of $*
- Adding exit condition with cd command
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Disha Goel <disgoel@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: linuxppc-dev@lists.ozlabs.org
Link: https://lore.kernel.org/r/20230709182800.53002-16-atrajeev@linux.vnet.ibm.comSigned-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/check-headers.sh

@@ -123,7 +123,7 @@ check () {
 
   shift
 
-  check_2 "tools/$file" "$file" $*
+  check_2 "tools/$file" "$file" "$@"
 }
 
 beauty_check () {
@@ -131,7 +131,7 @@ beauty_check () {
 
   shift
 
-  check_2 "tools/perf/trace/beauty/$file" "$file" $*
+  check_2 "tools/perf/trace/beauty/$file" "$file" "$@"
 }
 
 # Check if we have the kernel headers (tools/perf/../../include), else
@@ -183,7 +183,7 @@ done
 check_2 tools/perf/util/hashmap.h tools/lib/bpf/hashmap.h
 check_2 tools/perf/util/hashmap.c tools/lib/bpf/hashmap.c
 
-cd tools/perf
+cd tools/perf || exit
 
 if [ ${#FAILURES[@]} -gt 0 ]
 then