Add support for riscv64

Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>

golang.spec

@@ -1,7 +1,7 @@
 %bcond_with bootstrap
 # temporalily ignore test failures
 # due to https://github.com/golang/go/issues/39466
-%ifarch aarch64
+%ifarch aarch64 riscv64
 %bcond_without ignore_tests
 %else
 %bcond_with ignore_tests
@@ -39,14 +39,14 @@
 # Golang build options.
 
 # Build golang using external/internal(close to cgo disabled) linking.
-%ifarch %{ix86} x86_64 ppc64le %{arm} aarch64 s390x
+%ifarch %{ix86} x86_64 ppc64le %{arm} aarch64 s390x riscv64
 %global external_linker 1
 %else
 %global external_linker 0
 %endif
 
 # Build golang with cgo enabled/disabled(later equals more or less to internal linking).
-%ifarch %{ix86} x86_64 ppc64le %{arm} aarch64 s390x
+%ifarch %{ix86} x86_64 ppc64le %{arm} aarch64 s390x riscv64
 %global cgo_enabled 1
 %else
 %global cgo_enabled 0
@@ -104,13 +104,16 @@
 %ifarch s390x
 %global gohostarch  s390x
 %endif
+%ifarch riscv64
+%global gohostarch  riscv64
+%endif
 
 %global go_api 1.15
 %global go_version 1.15.5
 
 Name:           golang
 Version:        1.15.5
-Release:        1%{?dist}
+Release:        1.0.riscv64%{?dist}
 Summary:        The Go Programming Language
 # source tree includes several copies of Mark.Twain-Tom.Sawyer.txt under Public Domain
 License:        BSD and Public Domain
@@ -536,7 +539,7 @@ export CGO_ENABLED=0
 #endif
 
 # make sure to not timeout
-export GO_TEST_TIMEOUT_SCALE=2
+export GO_TEST_TIMEOUT_SCALE=20
 
 %if %{fail_on_tests}
 ./run.bash --no-rebuild -v -v -v -k
@@ -608,6 +611,9 @@ fi
 %endif
 
 %changelog
+* Tue Dec 01 2020 David Abdurachmanov <david.abdurachmanov@sifive.com> - 1.15.5-1.0.riscv64
+- Add support for riscv64
+
 * Fri Nov 13 2020 Jakub Čajka <jcajka@redhat.com> - 1.15.5-1
 - Rebase to go1.15.5
 - Security fix for CVE-2020-28362, CVE-2020-28367 and CVE-2020-28366