isl-0.26-160000.2.2

- update to 0.26:
  * fix inherited overloaded methods in Python bindings
  * decompose topological sort of clusters in incremental
    scheduler
  * improved isl_pw_aff_list_{min,max}
  * add some convenience functions
  * more exports to (templated C++) bindings
  * slightly improved conversion from binary relation to function

- update to 0.25:
  * support (type safe) user object on id in bindings
  * more exports to (templated C++) bindings
  * add some convenience functions

- update to 0.24:
  - improved (C++) bindings (inherit methods, renamed exports)
  - initial templated C++ bindings
  - detect bounds on constant polynomials as tight

- Compile with %optflags

- update to 0.23:
  - minor improvements to coalescing
  - use build compiler to build extract_interface
  - add some convenience functions
  - ignore parameters in isl_union_* hash tables

- Update to 0.22.1:
  - fix error handling
- Remove isl_basic_map_underlying_set-fix.patch with is part
  of the release.

- Add isl_basic_map_underlying_set-fix.patch from upstream.

- Update to 0.22:
  * improved bindings
  * scheduler fix involving fixed dimensions
  * accept ranges in tuples during parsing
  * add some convenience functions
- Update to 0.21:
  * preliminary C++ bindings
  * use incremental scheduler by default
  * introduce isl_size type
  * rename isl_ast_op_type to isl_ast_expr_op_type
  * fix coalescing bugs
  * use isl_bool to return extra boolean argument

- Update to 0.20
  * keep track of domain in 0D isl_multi_pw_aff and
    isl_multi_union_pw_aff
  * add isl_aff_eval and isl_pw_aff_eval
  * add fixed-size rectangular box hull

- Update to 0.19
  * minor improvements to coalescing
  * minor improvement to parametric integer programming
  * try harder to avoid large coefficients in scheduler
  * support kill accesses in dependence analysis
  * drop deprecated isl_int
  * drop deprecated band forests
  * drop deprecated functions