Dynamically load libwayland-egl.so.1 when dealing with Wayland.

[mcourteaux]

Follow-up on #3358. Tested with SilverNode and the examples under both Vulkan (irrelevant) and EGL (relevant).

Confirmed that libwayland-egl.so is no longer linked:

❯ ldd .build/linux64_gcc/bin/example-06-bumpRelease
	linux-vdso.so.1 (0x00007f9005562000)
	libSDL2-2.0.so.0 => /lib64/libSDL2-2.0.so.0 (0x00007f9005373000)
	libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007f9005000000)
	libm.so.6 => /lib64/libm.so.6 (0x00007f900528f000)
	libmvec.so.1 => /lib64/libmvec.so.1 (0x00007f9004f06000)
	libc.so.6 => /lib64/libc.so.6 (0x00007f9004d15000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f9005564000)
	libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f9004ce7000)