[PATCH] Fix x86-64: Add R_X86_64_CODE_4_GOTPCRELX

[Alan Modra]

There are these fails too:
x86_64-cloudabi  +FAIL: x86-64 EVEX-promoted bad
x86_64-rdos  +FAIL: x86-64 EVEX-promoted bad
x86_64-w64-mingw32  +FAIL: x86_64 APX_F pushp popp insns
x86_64-w64-mingw32  +FAIL: x86_64 APX_F pushp popp insns (Intel disassembly)
x86_64-w64-mingw32  +FAIL: x86-64 EVEX-promoted bad
x86_64-w64-mingw32  +FAIL: x86-64 APX NDD instructions with evex prefix encoding
x86_64-w64-mingw32  +FAIL: x86-64 APX NDD optimized encoding

-- 
Alan Modra
Australia Development Lab, IBM