Enable riscv64 (bootstrap, tests disabled)

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

golang.spec

@@ -1,7 +1,11 @@
+%ifnarch riscv64
 %bcond_with bootstrap
+%else
+%bcond_without bootstrap
+%endif
 # 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 +43,14 @@
 # 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
@@ -67,7 +71,7 @@
 %endif
 
 # Build golang shared objects for stdlib
-%ifarch %{ix86} x86_64 ppc64le %{arm} aarch64
+%ifarch %{ix86} x86_64 ppc64le %{arm} aarch64 riscv64
 %global shared 1
 %else
 %global shared 0
@@ -104,6 +108,9 @@
 %ifarch s390x
 %global gohostarch  s390x
 %endif
+%ifarch riscv64
+%global gohostarch  riscv64
+%endif
 
 # Comment out go_prerelease and go_patch as needed
 %global go_api 1.19
@@ -118,7 +125,7 @@
  
 Name:           golang
 Version:        %{go_version}
-Release:        %{baserelease}%{?dist}
+Release:        %{baserelease}.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
@@ -468,7 +475,7 @@ 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
@@ -538,6 +545,9 @@ fi
 %endif
 
 %changelog
+* Fri Jul 22 2022 David Abdurachmanov <davidlt@rivosinc.org> - 1.19~rc2-2.0.riscv64
+- Enable riscv64 (bootstrap)
+
 * Thu Jul 21 2022 Fedora Release Engineering <releng@fedoraproject.org> - 1.19~rc2-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild