Make newer DRM and GBM functions optional #1

Job	Run time
Create test plan	8s
level1 / Haiku	1m 36s
level2 / iOS (CMake & xcode)	2m 4s
level2 / PowerPC64	1m 51s
level2 / RISC OS	1m 13s
level2 / Ubuntu 20.04	4m 11s
level2 / Windows (MSVC, clang-cl x86)	4m 57s
level2 / Android (CMake)	4m 4s
level2 / Emscripten	7m 27s
level2 / NetBSD	2m 36s
level2 / Ubuntu 20.04 (Intel oneAPI)	6m 3s
level2 / LoongArch64	2m 39s
level2 / Sony PlayStation Vita (GLES w/ PVR_PSP2)	3m 2s
level2 / Android (Gradle)	2m 0s
level2 / FreeBSD	2m 51s
level2 / Ubuntu 22.04	4m 27s
level2 / Windows (msys2, clang64)	5m 35s
level2 / GDK (MSVC, x64)	3m 1s
level2 / MacOS (Framework) (x64)	4m 28s
level2 / Windows (msys2, clang32)	7m 1s
level2 / UWP (MSVC, x64)	3m 47s
level2 / MacOS (Framework) (arm64)	2m 18s
level2 / MacOS (GNU prefix)	2m 52s
level2 / tvOS (CMake & xcode)	3m 8s
level2 / Windows (msys2, mingw64)	7m 51s
level2 / Windows (MSVC, ARM64)	2m 48s
level2 / Windows (MSVC, x64)	4m 20s
level2 / Windows (MSVC, clang-cl x64)	4m 56s
level2 / Windows (msys2, mingw32)	8m 8s
level2 / Android (CMake, lean)	3m 43s
level2 / Sony PlayStation Portable	3m 32s
level2 / Nintendo 3DS	1m 58s
level2 / Ubuntu 20.04 (Intel Compiler)	5m 2s
level2 / Sony PlayStation 2	4m 35s
level2 / Windows (MSVC, x86)	4m 31s
level2 / Sony PlayStation Vita (GLES w/ pib)	3m 5s
level2 / Windows (msys2, ucrt64)	8m 46s
level2 / Android (Android.mk)	4m 33s
level2 / Windows (MSVC, ARM)	2m 52s
	2h 33m 59s

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