[dist] obs-bundled-gems.spec: fix build on ppc by dropping

[bugfinder]

the useless "-march=native" compile flag unsupported on power when building rubygem-sassc

[codecov]

Codecov Report

Merging #8234 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #8234      +/-   ##
==========================================
- Coverage   90.21%   90.18%   -0.03%     
==========================================
  Files         502      502              
  Lines       21453    21453              
==========================================
- Hits        19353    19347       -6     
- Misses       2100     2106       +6

[codecov]

Codecov Report

Merging #8234 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #8234      +/-   ##
==========================================
- Coverage   90.21%   90.18%   -0.03%     
==========================================
  Files         502      502              
  Lines       21453    21453              
==========================================
- Hits        19353    19347       -6     
- Misses       2100     2106       +6

[hennevogel]

They desperately need help getting their build of libsass in order or allow to use the system libs...

[bugfinder]

at least in sassc-2.1.0 the libsass sources are byte-identical to the sources of libsass-3.6.1,
the only differences are removed files but no changed code at all. So patching in a "use-system-libraries" option is IMHO the way to go there