Add a script for building the test applications and running them

hello/.gitignore

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+*.exe

run-tests.sh

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+#!/bin/sh
+
+set -ex
+
+if [ $# -lt 1 ]; then
+    echo $0 dest
+    exit 1
+fi
+PREFIX="$1"
+export PATH=$PREFIX/bin:$PATH
+
+: ${ARCHS:=${TOOLCHAIN_ARCHS-i686 x86_64 armv7 aarch64}}
+
+cd hello
+for arch in $ARCHS; do
+    $arch-w64-mingw32-clang hello.c -o hello-$arch.exe
+    $arch-w64-mingw32-clang hello-tls.c -o hello-tls-$arch.exe
+    $arch-w64-mingw32-clang++ hello.cpp -o hello-cpp-$arch.exe -fno-exceptions
+    $arch-w64-mingw32-clang++ hello-exception.cpp -o hello-exception-$arch.exe
+    if [ "$arch" = "i686" ] || [ "$arch" = "x86_64" ]; then
+        wine hello-$arch.exe
+        wine hello-tls-$arch.exe
+        wine hello-cpp-$arch.exe
+        wine hello-exception-$arch.exe
+    fi
+done