go1.12-1.12.17-1.29.2

- Ensure ARM arch is set properly - boo#1169832

- Requires binutils-gold for %arm and aarch64 - boo#1170826

- Revert truncate changelog for versions older than go1.12

- go1.12.17 (released 2020/02/12) includes a fix to the runtime.
  Refs boo#1141689.
  * go#36574 runtime: "PowerRegisterSuspendResumeNotification failed with errno= 87" when running in Windows docker containers
  * Truncate changelog for versions older than go1.12

- go1.12.16 (released 2020/01/28) includes two security fixes to
  the crypto/x509 package.
  Refs boo#1141689.
  * go#36839 crypto/x509, x/crypto/cryptobyte: panic in certificate parsing
  * go#36836 crypto/x509: certificate validation bypass on Windows 10

- go1.12.15 (released 2020/01/09) includes fixes to the runtime
  and the net/http package.
  Refs boo#1141689.
  * go#36433 net/http: racing write to t.ProxyConnectHeader in dialConn when proxy URL includes auth credentials
  * go#36377 runtime: "fatal error: PowerRegisterSuspendResumeNotification failure" when running in Windows docker containers
  * go#36376 runtime: Timer buckets may get "stuck" for long periods of time after Windows 8/10 systems wake from sleep
  * go#36367 runtime: sweep increased allocation count crash on arm64
  * go#36002 doc: release history webpage contains suboptimal links

- go1.12.14 (released 2019/12/04) includes a fix to the runtime.
  Refs boo#1141689.
  * go#35747 ensure that Go toolchain meets Apple's notarization requirements
  * go#35210 runtime: function textOff returns incorrect value if multiple text sections are present

- go1.12.13 (released 2019/10/31) fixes an issue on macOS 10.15
  Catalina where the non-notarized installer and binaries were
  being rejected by Gatekeeper. Only macOS users who hit this issue
  need to update.
  Refs boo#1141689.

- Add %ifarch %arm aarch64 BuildRequires: binutils-gold to fix
  /usr/lib64/go/{version}/pkg/tool/linux_arm64/link: running gcc failed: exit status 1
  collect2: fatal error: cannot find 'ld'-

- Remove unneeded systemd BuildRequires.