xcoff: add resource test files (#4)

xcoff/base.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main() {
+    printf("Hello, world");
+    return 0;
+}

xcoff/base.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+clang base.c --target=powerpc64-ibm-aix-xcoff -m64 -c -o base.o
+clang base.c --target=powerpc64-ibm-aix-xcoff -m64 -o base.xcoff
+clang base.c --target=powerpc-ibm-aix-xcoff -m32 -c -o base32.o
+clang base.c --target=powerpc-ibm-aix-xcoff -m32 -o base32.xcoff