Configure build to never link against libunwind or valgrind.
Prevents accidental linkage against those libraries in case they are
present.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
-Dglvnd=disabled \
-Dopengl=false \
-Dandroid-stub=false \
+ -Dlibunwind=disabled \
+ -Dvalgrind=disabled \
-Dgallium-drivers= \
-Dvulkan-drivers= \
-Dosmesa=false \
-Dglvnd=disabled \
-Dopengl=true \
-Dandroid-stub=false \
+ -Dlibunwind=disabled \
+ -Dvalgrind=disabled \
-Dtools= \
-Dllvm=$(if $(MESA_USE_LLVM),en,dis)abled \
-Dshared-glapi=enabled \