perf tests: Add missing SPDX headers

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-p0kg493z2m8qizjbdefzip1i@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/shell/lib/probe.sh

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
 
 skip_if_no_perf_probe() {

tools/perf/tests/shell/probe_vfs_getname.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 # Add vfs_getname probe to get syscall args filenames
-#
+
+# SPDX-License-Identifier: GPL-2.0
 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
 
 . $(dirname $0)/lib/probe.sh

tools/perf/tests/shell/record+probe_libc_inet_pton.sh

@@ -7,6 +7,7 @@
 # This needs no debuginfo package, all is done using the libc ELF symtab
 # and the CFI info in the binaries.
 
+# SPDX-License-Identifier: GPL-2.0
 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
 
 . $(dirname $0)/lib/probe.sh

tools/perf/tests/shell/record+script_probe_vfs_getname.sh

@@ -6,6 +6,7 @@
 # checks that that was captured by the vfs_getname probe in the generated
 # perf.data file, with the temp file name as the pathname argument.
 
+# SPDX-License-Identifier: GPL-2.0
 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
 
 . $(dirname $0)/lib/probe.sh

tools/perf/tests/shell/record+zstd_comp_decomp.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 # Zstd perf.data compression/decompression
 
+# SPDX-License-Identifier: GPL-2.0
+
 trace_file=$(mktemp /tmp/perf.data.XXX)
 perf_tool=perf
 

tools/perf/tests/shell/trace+probe_vfs_getname.sh

@@ -7,6 +7,7 @@
 # that already handles "probe:vfs_getname" if present, and used in the
 # "open" syscall "filename" argument beautifier.
 
+# SPDX-License-Identifier: GPL-2.0
 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
 
 . $(dirname $0)/lib/probe.sh