Add COMPILER_SUPPORT CMake flag, do not build effect/compiler files if disabled

Read SYMTYPE_TEXTURE* large objs and read their names (thanks Maik!)

Use param name ptr for sampler_name

Remove builtins hack for glsles

Minor fixes from FNA branch

Always return a non-NULL pointer for malloc(0). Some C runtimes, like musl, will return NULL in this case. It's more convenient to not get a NULL (which is meant to be interpreted as a failure), but instead get a non-NULL pointer that can't be dereferenced (because it's a pointer to zero bytes of memory).

Count constant arrays for the uniform_count. Fixes buffer overflow. This one got found by AFL, too, but it's a legit bug that can happen with legit shaders.

A bunch of fixes for bugs that that American Fuzzy Lop exposed. http://lcamtuf.coredump.cx/afl/ All of these bugs would never trigger on valid shaders, but it's conceivable that an attacker could hit a game that supports modding and craft a malicious shader to crash the game, so these were worth fixing in any case.

Sort register lists by register type first, then register number. This groups all the registers by type first, which is useful for packing heterogeneous uniform buffers later.

parse_preshader merge fixes