perf tests: Fix test_arm_callgraph_fp variable expansion

$TEST_PROGRAM is a command with spaces so it's supposed to be word
split. The referenced fix to fix the shellcheck warnings incorrectly
quoted this string so unquote it to fix the test.

At the same time silence the shellcheck warning for that line and fix
two more shellcheck errors at the end of the script.

Fixes: 1bb17b4 ("perf tests arm_callgraph_fp: Address shellcheck warnings about signal names and adding double quotes for expression")
Signed-off-by: James Clark <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: [email protected]
Cc: Peter Zijlstra <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kajol Jain <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Athira Rajeev <[email protected]>
Cc: Ingo Molnar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>

Author: James-A-Clark

tools/perf/tests/shell/test_arm_callgraph_fp.sh

@@ -15,7 +15,8 @@ cleanup_files()
 trap cleanup_files EXIT TERM INT
 
 # Add a 1 second delay to skip samples that are not in the leaf() function
-perf record -o "$PERF_DATA" --call-graph fp -e cycles//u -D 1000 --user-callchains -- "$TEST_PROGRAM" 2> /dev/null &
+# shellcheck disable=SC2086
+perf record -o "$PERF_DATA" --call-graph fp -e cycles//u -D 1000 --user-callchains -- $TEST_PROGRAM 2> /dev/null &
 PID=$!
 
 echo " + Recording (PID=$PID)..."
@@ -33,8 +34,8 @@ wait $PID
 # 	76c leafloop
 # ...
 
-perf script -i $PERF_DATA -F comm,ip,sym | head -n4
-perf script -i $PERF_DATA -F comm,ip,sym | head -n4 | \
+perf script -i "$PERF_DATA" -F comm,ip,sym | head -n4
+perf script -i "$PERF_DATA" -F comm,ip,sym | head -n4 | \
 	awk '{ if ($2 != "") sym[i++] = $2 } END { if (sym[0] != "leaf" ||
 						       sym[1] != "parent" ||
 						       sym[2] != "leafloop") exit 1 }'