Enable ppc64le in openresty

This PR fixes issue #731
For every PR, an equivalent Travis job is triggered for ppc64le architecture.

Signed-off-by: Krishna Harsha Voora <krishvoor@in.ibm.com>

.travis.yml

@@ -34,6 +34,24 @@ linux-s390x: &linux-s390x
             - libpcre3-dev
             - mercurial
             - libpq-dev
+
+linux-ppc64le: &linux-ppc64le
+  os: linux
+  arch: ppc64le
+  dist: xenial
+  compiler: gcc
+  addons:
+      apt:
+          update: true
+          packages:
+            - axel
+            - dos2unix
+            - cpanminus
+            - libgd-dev
+            - libpcre3
+            - libpcre3-dev
+            - mercurial
+            - libpq-dev
   install:
     - sudo cpanm --notest Test::Nginx IPC::Run3 > build.log 2>&1 || (cat build.log && exit 1)
     - if [ ! -f download-cache/openssl-$OPENSSL_VER.tar.gz ]; then wget -P download-cache https://www.openssl.org/source/openssl-$OPENSSL_VER.tar.gz || wget -P download-cache https://www.openssl.org/source/old/${OPENSSL_VER//[a-z]/}/openssl-$OPENSSL_VER.tar.gz; fi
@@ -84,6 +102,12 @@ jobs:
           env: OPENSSL_VER=1.1.0l OPENSSL_PATCH_VER=1.1.0d
         - <<: *linux-s390x
           env: OPENSSL_VER=1.1.1f OPENSSL_PATCH_VER=1.1.1f
+        - <<: *linux-ppc64le
+          env: OPENSSL_VER=1.0.2u OPENSSL_PATCH_VER=1.0.2h
+        - <<: *linux-ppc64le
+          env: OPENSSL_VER=1.1.0l OPENSSL_PATCH_VER=1.1.0d
+        - <<: *linux-ppc64le
+          env: OPENSSL_VER=1.1.1f OPENSSL_PATCH_VER=1.1.1f
 
 install:
   - sudo cpanm --notest Test::Nginx IPC::Run3 > build.log 2>&1 || (cat build.log && exit 1)