glu-9.0.0-8.45

- U_build-fix.patch
  * build fix for sle15-sp2 (bsc#1158161)

- includes everything needed for missing sle issue entries:
  fate #315643-315645, 319159-319161, 319618 (bsc#1041327)

- U_Add-D-N-DEBUG-to-CFLAGS-dependent-on-enable-debug.patch
  u_autoconf-Don-t-modify-CFLAGS-in-configure-scripts.patch
  Avoid debug messages being printed out at runtime (bsc#988411).

- fixed buildrequires: pkgconfig(dri) -> pkgconfig(gl)
- added baselibs.conf as source to specfile

- Use more robust make install call

- Add Obsoletes/Provides for Mesa-libGLU1
- Avoid running configure twice

- fixed and simplified BuildRequires

- license update: SUSE-SGI-FreeB-2.0
  SGI-FreeB-2.0 is MIT with an advertising clause at the bottom

- rename to glu and use "official" git snapshot

- created package (since GLU has been split out from Mesa)