Replaced the libepoxy-stub (hardcoded inline stubs returning 0 for
all EGL/GLES extension queries) with the real libepoxy v6.0 2026
recipe. libepoxy builds against Mesa EGL/GLES2 with full function
pointer dispatch via epoxy_*_resolve().
The real recipe was already populated with full source (meson build,
dispatch_egl.c, dispatch_glx.c, etc.) but was never wired into KWin.
libudev-stub remains until libudev source is populated.
This unblocks KWin's cmake configure step which needs real
epoxy::epoxy cmake target with actual GL/EGL function pointer
resolution, not the hardcoded-zero stub.
vasilito
2abe309b15