gh-36316: build/pkgs/lrcalc_python: add standard python spkg-configure.m4
    
I'm adding this to Gentoo in about five minutes, and the system copy
works fine.
    
URL: #36316
Reported by: Michael Orlitzky
Reviewer(s): Matthias Köppe

Author: Release Manager

build/pkgs/lrcalc_python/spkg-configure.m4

@@ -0,0 +1 @@
+SAGE_SPKG_CONFIGURE([lrcalc_python], [SAGE_PYTHON_PACKAGE_CHECK([lrcalc_python])])