Skip creating a PDB file if a debug build hasn't been requested
Skip creating a PDB file if a debug build hasn't been requested

When running MSVC on linux via wine, the PDB output doesn't work;
this allows skipping that part.

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