gle-3.1.0-1.30

- Improve RPM group classification and summaries.
  Use pkgconfig() names to pull in build dependencies.
  Drop --with-pic as shared libs are implicitly PIC already.

- Add libXmu-devel and libXi-devel BuildRequires: configure
  explicitly checks for the presence of those libraries.

- Remove redundant tags/sections
- Parallel build with %_smp_mflags

- add libtool as buildrequire to make the spec file more reliable

- create libgle3 and libgle-devel packages conforming
  to shared library policy

- fix library-without-ldconfig-post* errors
- spec file cleanup

- update to 3.1.0:
  * alphablending support

- changed MAXFLOAT to FLT_MAX

- changed 1.0e50 constants to MAXFLOAT [#216971]

- converted neededforbuild to BuildRequires