add the C library headers MSVC needs

Unqualified uint8_t/size_t and friends were reaching 24 units through
some other header on libstdc++; MSVC's STL does not do that, which broke
gl/ubo.cppm (and made its UBS_PAD macro look like garbage). Also
silences C5244, MSVC's counterpart to the clang warning about glm being
included in the module purview, which is deliberate here.

utilities/glm_module.cppm

@@ -46,6 +46,10 @@ export module eu07.glm;
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Winclude-angled-in-module-purview"
 #endif
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 5244)
+#endif
 export {
 #include <glm/glm.hpp>
 #include <glm/fwd.hpp>
@@ -71,6 +75,9 @@ export {
 #ifdef __clang__
 #pragma clang diagnostic pop
 #endif
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
 
 export {
 // 12-byte vec3 that stays packed regardless of GLM_FORCE_DEFAULT_ALIGNED_GENTYPES.