Modify Travis to only use partner queues

Currently github actions only runs CI on x86. Travis has 'partner
queues' which do not use credits. By changing .travis.yml to only
use these, forks can use Travis to test on arm64 and ppc64le. I
intend to use this to run travis every now and then on my own
clone of xiph/flac

.travis.yml

@@ -1,29 +1,61 @@
 language: c
 
-os:
-  - linux
-  - osx
+jobs:
+  include:
+  - os: linux
+    dist: focal
+    arch: arm64
+    compiler: gcc
+    env: BUILD_SYSTEM="cmake" CONFIGURE_OPTS=-DFLAC__NO_ASM=1
+  - os: linux
+    dist: focal
+    arch: arm64
+    compiler: gcc
+    env: BUILD_SYSTEM="cmake" CONFIGURE_OPTS=
+  - os: linux
+    dist: focal
+    arch: arm64
+    compiler: gcc
+    env: BUILD_SYSTEM="autotools" CONFIGURE_OPTS=
+#  - os: linux
+#    dist: focal
+#    arch: arm64
+#    compiler: clang
+#    env: BUILD_SYSTEM="cmake" CONFIGURE_OPTS=-DWITH_STACK_PROTECTOR=OFF # Clang on focal arm64 seems broken, can't find a way to reproduce this on my machine
+  - os: linux
+    dist: focal
+    arch: arm64
+    compiler: gcc
+    env: BUILD_SYSTEM="cmake" CONFIGURE_OPTS=-DENABLE_64_BIT_WORDS=ON
+  - os: linux
+    dist: focal
+    arch: ppc64le
+    compiler: gcc
+    env: BUILD_SYSTEM="cmake" CONFIGURE_OPTS=-DFLAC__NO_ASM=1
+  - os: linux
+    dist: focal
+    arch: ppc64le
+    compiler: gcc
+    env: BUILD_SYSTEM="cmake" CONFIGURE_OPTS=
+  - os: linux
+    dist: focal
+    arch: ppc64le
+    compiler: gcc
+    env: BUILD_SYSTEM="autotools" CONFIGURE_OPTS=
+  - os: linux
+    dist: focal
+    arch: ppc64le
+    compiler: clang
+    env: BUILD_SYSTEM="cmake" CONFIGURE_OPTS=
+  - os: linux
+    dist: focal
+    arch: ppc64le
+    compiler: gcc
+    env: BUILD_SYSTEM="cmake" CONFIGURE_OPTS=-DENABLE_64_BIT_WORDS=ON
 
-dist: xenial
-
-compiler:
-  - gcc
-  - clang
-
-env:
-  matrix:
-  - BUILD_SYSTEM="autotools" CONFIGURE_OPTS=
-  - BUILD_SYSTEM="autotools" CONFIGURE_OPTS=--enable-64-bit-words
-  - BUILD_SYSTEM="cmake"     CONFIGURE_OPTS=
-  - BUILD_SYSTEM="cmake"     CONFIGURE_OPTS=-DENABLE_64_BIT_WORDS=ON
 install:
-  - if [ $TRAVIS_OS_NAME = linux ]; then sudo apt-get -y install libtool-bin libogg-dev doxygen libxml2-utils w3c-sgml-lib; fi
-  - if [ $TRAVIS_OS_NAME = osx ]; then brew update ; brew install libogg; fi
+  - if [ $TRAVIS_OS_NAME = linux ]; then sudo apt-get -y install libtool-bin libogg-dev; fi
 
 script:
   - if [[ "${BUILD_SYSTEM}" == "autotools" ]]; then ./autogen.sh && ./configure $CONFIGURE_OPTS && make && make check; fi
-  - if [[ "${BUILD_SYSTEM}" == "cmake" ]]; then mkdir cmake-build && cd cmake-build && cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON $CONFIGURE_OPTS && cmake --build . && ctest -V; fi
-  - if [ $TRAVIS_OS_NAME = linux ] && [ ${BUILD_SYSTEM} = "autotools" ]; then
-      xmllint --valid --noout doc/html/*.html;
-      xmllint --valid --noout doc/html/api/*.html;
-    fi
+  - if [[ "${BUILD_SYSTEM}" == "cmake" ]]; then mkdir cmake-build && cd cmake-build && cmake .. -DCMAKE_BUILD_TYPE=Release $CONFIGURE_OPTS && cat config.h && cmake --build . && travis_wait 30 ctest --output-on-failure; fi