Remap -std=c++14 dialect names for older compilers
Remap -std=c++14 dialect names for older compilers

* GCC 4.8 and Clang 3.2, 3.3, 3.4 only understand
  `-std={c,gnu}++1y` for enabling C++14 dialects.
  GCC 4.8 is especially important as it is the basis
  of RHEL/CentOS 7.

mesonbuild/meson,jeandet/meson,MathieuDuponchelle/meson,becm/meson,mesonbuild/meson,QuLogic/meson,jeandet/meson,becm/meson,jeandet/meson,jpakkane/meson,mesonbuild/meson,pexip/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,pexip/meson,becm/meson,jeandet/meson,MathieuDuponchelle/meson,mesonbuild/meson,becm/meson,jpakkane/meson,MathieuDuponchelle/meson,mesonbuild/meson,becm/meson,becm/meson,MathieuDuponchelle/meson,QuLogic/meson,jeandet/meson,jeandet/meson,becm/meson,MathieuDuponchelle/meson,pexip/meson,jpakkane/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,MathieuDuponchelle/meson,mesonbuild/meson,becm/meson,QuLogic/meson,QuLogic/meson,MathieuDuponchelle/meson,jpakkane/meson,pexip/meson,jpakkane/meson,becm/meson,MathieuDuponchelle/meson,pexip/meson,QuLogic/meson,QuLogic/meson,jeandet/meson,mesonbuild/meson,pexip/meson,pexip/meson,jpakkane/meson,jpakkane/meson,jpakkane/meson,QuLogic/meson,jeandet/meson,MathieuDuponchelle/meson,becm/meson,QuLogic/meson,pexip/meson,jeandet/meson,mesonbuild/meson