build_macos_native.sh uses wrong cmake call

[Selur]

cmake -DCMAKE_BUILD_TYPE=Release -DTSMUXER_STATIC_BUILD=TRUE \
  "-DFREETYPE_LDFLAGS=bz2;$(brew --prefix)/lib/libpng.a" -DTSMUXER_GUI=TRUE \
  -DWITHOUT_PKGCONFIG=TRUE -DQT_VERSION=$qtver ..

should be:

cmake -DCMAKE_BUILD_TYPE=Release -DTSMUXER_STATIC_BUILD=TRUE \
  "-DFREETYPE_LDFLAGS=bz2;$(brew --prefix)/lib/libpng.a" -DTSMUXER_GUI=TRUE \
  -DWITHOUT_PKGCONFIG=TRUE -DQT_VERSION=$qtver ../..