Add python3-dev build_depend to lttngpy. (#146)

This is needed because the CMakeLists.txt file for
this package does:

find_package(Python3 REQUIRED COMPONENTS Interpreter Development)

Otherwise, it may fail to build on certain platforms
on the buildfarm (like RHEL-9).

Signed-off-by: Chris Lalancette <[email protected]>

Author: clalancette

Diff for: lttngpy/package.xml

@@ -17,6 +17,7 @@
   <depend>liblttng-ctl-dev</depend>
 
   <build_depend>pybind11_vendor</build_depend>
+  <build_depend>python3-dev</build_depend>
 
   <exec_depend>rpyutils</exec_depend>