dev: add riscv64 to the install script (#3220)

Author: ldez

install.sh

@@ -1,7 +1,5 @@
 #!/bin/sh
 set -e
-# Code generated by godownloader. DO NOT EDIT.
-#
 
 usage() {
   this=$1
@@ -88,6 +86,7 @@ get_binaries() {
     linux/mips64le) BINARIES="golangci-lint" ;;
     linux/ppc64le) BINARIES="golangci-lint" ;;
     linux/s390x) BINARIES="golangci-lint" ;;
+    linux/riscv64) BINARIES="golangci-lint" ;;
     windows/386) BINARIES="golangci-lint" ;;
     windows/amd64) BINARIES="golangci-lint" ;;
     windows/arm64) BINARIES="golangci-lint" ;;
@@ -230,7 +229,7 @@ uname_os_check() {
     solaris) return 0 ;;
     windows) return 0 ;;
   esac
-  log_crit "uname_os_check '$(uname -s)' got converted to '$os' which is not a GOOS value. Please file bug at https://github.com/client9/shlib"
+  log_crit "uname_os_check '$(uname -s)' got converted to '$os' which is not a GOOS value."
   return 1
 }
 uname_arch_check() {
@@ -249,9 +248,10 @@ uname_arch_check() {
     mips64) return 0 ;;
     mips64le) return 0 ;;
     s390x) return 0 ;;
+    riscv64) return 0 ;;
     amd64p32) return 0 ;;
   esac
-  log_crit "uname_arch_check '$(uname -m)' got converted to '$arch' which is not a GOARCH value.  Please file bug report at https://github.com/client9/shlib"
+  log_crit "uname_arch_check '$(uname -m)' got converted to '$arch' which is not a GOARCH value."
   return 1
 }
 untar() {