perf Makefile: Update Python script installation path

Replace the libpython feature test with a python-module feature test
checking for Python C extension build capability, and update feature
test references accordingly.

Remove references to the legacy scripts/python directory and install
standalone Python scripts (python/*.py), type stubs (python/perf.pyi),
and the compiled perf extension module (python/perf*.so, when built)
directly under the python directory in libexec. Update the TUI script
browser (ui/browsers/scripts.c) to discover standalone scripts from the
updated installation path.

Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/tools/build/feature/test-python-module.c b/tools/build/feature/test-python-module.c
new file mode 100644
index 000000000000..50e9e5062feb
--- /dev/null
+++ b/tools/build/feature/test-python-module.c
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <Python.h>
+
+int main(void)
+{
+	static struct PyModuleDef moduledef = {
+		PyModuleDef_HEAD_INIT,
+		.m_name = "test",
+	};
+	PyObject *module = PyModule_Create(&moduledef);
+
+	return module ? 0 : -1;
+}