Add golang build test

Author: mpe

tests/golang-build/.gitignore

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+go1.16.6.tar.gz
+go-go1.16.6

tests/golang-build/Makefile

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+help:
+	@echo "Golang build test"
+	@echo "Available targets:"
+	@echo "  download 	# download required sources"
+	@echo "  test 		# run the test"
+
+version = 1.16.6
+tarball = go${version}.tar.gz
+
+download: ${tarball}
+
+${tarball}:
+	wget -O $@.tmp https://github.com/golang/go/archive/refs/tags/${tarball}
+	mv $@.tmp $@
+
+test: download
+	@./test.sh
+
+clean:
+	rm -rf go-go${version}
+
+distclean: clean
+	rm -f ${tarball}
+
+.PHONY: download test clean distclean help

tests/golang-build/README.md

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+Golang build test
+=================
+
+This just builds go version 1.16.6, and then makes sure we can a basic go
+program with the build toolchain.
+
+Building this version of go tests the following kernel fixes:
+  - `a88603f4b92e ("powerpc/vdso: Don't use r30 to avoid breaking Go lang")`
+  - `4a5cb51f3db4 ("powerpc/64s/interrupt: Fix check_return_regs_valid() false positive")`

tests/golang-build/test.sh

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+#!/bin/bash
+
+set -euo pipefail
+
+name="golang-build"
+echo "test: $name"
+
+rc=0
+go version || rc=1
+if [[ $rc -ne 0 ]]; then
+    echo "Error: go missing, install with package manager" >&2
+    echo "failure: $name"
+    exit 1
+fi
+
+rm -rf go-go1.16.6
+tar -xf go1.16.6.tar.gz
+cd go-go1.16.6/src
+
+echo "Building ..."
+./all.bash
+
+../bin/go run ../test/helloworld.go
+
+echo "success: $name"
+
+exit 0