main/zstd: upgrade to 1.4.8
add "-fPIC" flag due to the following error:
cover.o: relocation R_X86_64_PC32 against symbol `stderr' can not be used when making a shared object; recompile with -fPIC
Edited by Andy Postnikov
add "-fPIC" flag due to the following error:
cover.o: relocation R_X86_64_PC32 against symbol `stderr' can not be used when making a shared object; recompile with -fPIC