Add missing libtcc i386 files (#261)

+ i386-asm.h
+ i386-gen.c
+ i386-link.c

from https://repo.or.cz/tinycc.git/commit/afc136262e93ae85fb3643005b36dbfc30d99c42

SHA512 (tinycc-afc1362/i386-asm.c) = 98abf361b41168b68a8e58b2325cec695fcd7f5e2ee2f02823a686693ff7b8b5c7e3817e421745229dd734aa4abbf8f1a1739dfca991fda8bbdf5e802be9c128
SHA512 (tinycc-afc1362/i386-asm.h) = 842d4402e327a5467b6768f3d1a48fd5a1cf83c291516779b7463b07d9f938f203703a9add835e43b1de58b7678e79315cc9b95405f1a14f8df44a0af3835672
SHA512 (tinycc-afc1362/i386-gen.c) = 699d2b0c7a096a59b474097a0dc6db391ccc2dbff2733ff8a2e7cd6ff57204862996e2e06022350e9fb00424bc329f1dca061c168ce000bc0851bc73c900d048
SHA512 (tinycc-afc1362/i386-link.c) = ffd3c986e8da72a793c3c39082e9a477b5a394447141fa41201a1fcfe19905f2a13d6538b5521e49eba67fa591bf2be4b1b69ad1d493e7720ecaf339a551411b
SHA512 (tinycc-afc1362/i386-tok.h) = 2ab5520c2c08b0d8be474363d5a43afd7c2a0e710003209fb81945695e48694515f207e6ba736d66968258bbc1adfe5c0255b6bad834f0ebfeea9512f9e51216

#260

Author: nunotexbsd