gollvm support for cpu/cpu_x86.s

[advancedwebdeveloper]

I was trying to build v2ray-core and caught some bugs:

~/go_projects/v2ray-core$ go test ./...

github.com/xtls/go/cpu

vendor/github.com/xtls/go/cpu/cpu_x86.s: Assembler messages:
vendor/github.com/xtls/go/cpu/cpu_x86.s:10: Error: no such instruction: text ·cpuid(SB),NOSPLIT,$0-24' vendor/github.com/xtls/go/cpu/cpu_x86.s:11: Error: junk (FP)' after expression
vendor/github.com/xtls/go/cpu/cpu_x86.s:11: Error: too many memory references for mov' vendor/github.com/xtls/go/cpu/cpu_x86.s:12: Error: junk (FP)' after expression
vendor/github.com/xtls/go/cpu/cpu_x86.s:12: Error: too many memory references for mov' vendor/github.com/xtls/go/cpu/cpu_x86.s:14: Error: too many memory references for mov'
vendor/github.com/xtls/go/cpu/cpu_x86.s:15: Error: too many memory references for mov' vendor/github.com/xtls/go/cpu/cpu_x86.s:16: Error: too many memory references for mov'
vendor/github.com/xtls/go/cpu/cpu_x86.s:17: Error: too many memory references for mov' vendor/github.com/xtls/go/cpu/cpu_x86.s:21: Error: no such instruction: text ·xgetbv(SB),NOSPLIT,$0-8'
vendor/github.com/xtls/go/cpu/cpu_x86.s:24: Error: too many memory references for mov' vendor/github.com/xtls/go/cpu/cpu_x86.s:25: Error: too many memory references for mov'

v2ray.com/core/external/github.com/cloudflare/sidh/internal/utils

external/github.com/cloudflare/sidh/internal/utils/cpuid_amd64.s: Assembler messages:
external/github.com/cloudflare/sidh/internal/utils/cpuid_amd64.s:5: Error: no such instruction: text ·cpuid(SB),NOSPLIT,$0-4' external/github.com/cloudflare/sidh/internal/utils/cpuid_amd64.s:6: Error: junk (FP)' after expression
external/github.com/cloudflare/sidh/internal/utils/cpuid_amd64.s:6: Error: too many memory references for mov' external/github.com/cloudflare/sidh/internal/utils/cpuid_amd64.s:7: Error: junk (FP)' after expression
external/github.com/cloudflare/sidh/internal/utils/cpuid_amd64.s:7: Error: too many memory references for mov' external/github.com/cloudflare/sidh/internal/utils/cpuid_amd64.s:9: Error: too many memory references for mov'
external/github.com/cloudflare/sidh/internal/utils/cpuid_amd64.s:10: Error: too many memory references for mov' external/github.com/cloudflare/sidh/internal/utils/cpuid_amd64.s:11: Error: too many memory references for mov'
external/github.com/cloudflare/sidh/internal/utils/cpuid_amd64.s:12: Error: too many memory references for `mov'

gollvm is used.
My release build.

CC @thanm @cherrymui

[RPRX]

v2fly/v2ray-core#249

[RPRX]

Related v2fly/v2ray-core#298