Add automatic tests for pull requests

Now when you send a pull request Travis CI will build the entire
repository and run all the tests for you automatically. It takes
approximately two minutes to finish so you can get fast feedback

.travis.yml

@@ -0,0 +1,4 @@
+virt: lxd
+os: linux
+language: c
+script: make -j4 V=0

tool/build/compile.c

@@ -500,7 +500,7 @@ int main(int argc, char *argv[]) {
    * log command being run
    */
   if (!strcmp(nulltoempty(getenv("V")), "0") && !IsTerminalInarticulate()) {
-    p = xasprintf("\e[F\e[K%-15s%s\r\n", firstnonnull(action, "BUILD"),
+    p = xasprintf("\r\e[K%-15s%s\r", firstnonnull(action, "BUILD"),
                   firstnonnull(target, nulltoempty(outpath)));
     n = strlen(p);
   } else {