bin/perf-annotate-jit: add .py suffix

To provide direct feedback about the file in question.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

docs/llvmpipe.html

@@ -206,7 +206,7 @@ On Linux, it is possible to have symbol resolution of JIT code with <a href="htt
 <p>
 When run inside Linux perf, llvmpipe will create a /tmp/perf-XXXXX.map file with
 symbol address table.  It also dumps assembly code to /tmp/perf-XXXXX.map.asm,
-which can be used by the bin/perf-annotate-jit script to produce disassembly of
+which can be used by the bin/perf-annotate-jit.py script to produce disassembly of
 the generated code annotated with the samples.
 </p>