[PATCH 3/5] travis.yml: Use newer version of libgnutls and libpng

[Thomas Huth]

libgnutls-dev and libpng12-dev are not available in newer versions
of Ubuntu anymore, so installing these packages fails e.g. in the
new arm64 containers on Travis. Let's use newer versions of these
packages by default instead. (The old versions still get tested in
the "gcc-9" build).

Signed-off-by: Thomas Huth <address@hidden>
---
 .travis.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index e21b9ad666..616e59867a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -29,7 +29,7 @@ addons:
       - libcap-dev
       - libcap-ng-dev
       - libgcc-4.8-dev
-      - libgnutls-dev
+      - libgnutls28-dev
       - libgtk-3-dev
       - libiscsi-dev
       - liblttng-ust-dev
@@ -37,7 +37,7 @@ addons:
       - libnfs-dev
       - libnss3-dev
       - libpixman-1-dev
-      - libpng12-dev
+      - libpng-dev
       - librados-dev
       - libsdl2-dev
       - libsdl2-image-dev
-- 
2.18.1