[librsvg/bochecha/srcdir-builddir] ci: Build with srcdir != builddir

[Mathieu Bridon <mbridon src gnome org>]

commit 57c0bdf63819e67550e95e1e7db5a6d4643ffa9f
Author: Mathieu Bridon <bochecha daitauha fr>
Date:   Mon Sep 10 14:01:43 2018 +0200

    ci: Build with srcdir != builddir
    
    This should prevent issues like the one fixed in the previous commit to
    creep back in.

 .gitlab-ci.yml | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1093ad63..42d7a6c9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -40,14 +40,17 @@ stages:
     - export CARGO_HOME="${PWD}/.cargo_cache"
   script:
     - rustc --version && cargo --version
-    - ./autogen.sh --enable-gtk-doc --enable-vala
-    - make check
+    - |
+      mkdir _build
+      cd _build
+      ../autogen.sh --enable-gtk-doc --enable-vala
+      make check
 
   artifacts:
     when: on_failure
     paths:
-      - tests/*.log
-      - tests/output/
+      - _build/tests/*.log
+      - _build/tests/output/
 
   cache:
     # JOB_NAME - Each job will have it's own cache
@@ -55,7 +58,7 @@ stages:
     # ^ Keep diffrerent caches for each branch
     key: "$CI_JOB_NAME-$CI_COMMIT_REF_SLUG"
     paths:
-      - target/
+      - _build/target/
       - .cargo_cache/
       - ccache/
 
@@ -141,8 +144,11 @@ tarball:
     LIBRSVG_DEBUG: "yes"
   script:
     - rustc --version && cargo --version
-    - ./autogen.sh --enable-gtk-doc --enable-vala
-    - make distcheck DESTDIR=/tmp/distcheck
+    - |
+      mkdir _build
+      cd _build
+      ../autogen.sh --enable-gtk-doc --enable-vala
+      make distcheck DESTDIR=/tmp/distcheck
   <<: *stage_2
 
 # STAGE 2 CROSS DISTRO TESTS