Merge pull request #653 from singlethink/bug-fix-noexec-check

Fix TMPDIR noexec check to explicitly exit with a zero exit status on success

bin/ruby-build

@@ -1027,7 +1027,10 @@ fi
 tmp_executable="${TMP}/ruby-build-test.$$"
 noexec=""
 if mkdir -p "$TMP" && touch "$tmp_executable" 2>/dev/null; then
-  cat > "$tmp_executable" <<<"#!$BASH"
+  cat > "$tmp_executable" <<-EOF
+	#!${BASH}
+	exit 0
+	EOF
   chmod +x "$tmp_executable"
 else
   echo "ruby-build: TMPDIR=$TMP is set to a non-accessible location" >&2