ARM CI (#148)

* Add ARM setup

* Factor what can be into common scripts

ci/scripts/build.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+mkdir build
+cd build
+
+CMAKE_CXX_FLAGS="-std=c++17"
+if [[ "$CXX" == clang++* ]]; then
+    CMAKE_CXX_FLAGS+=" -stdlib=libstdc++";
+fi
+
+cmake \
+  $CMAKE_ARGS \
+  -GNinja \
+  -DSNMALLOC_CI_BUILD=ON \
+  -DSNMALLOC_RUST_SUPPORT=ON \
+  -DSNMALLOC_QEMU_WORKAROUND=ON \
+  -DCMAKE_BUILD_TYPE=$BUILD_TYPE \
+  -DCMAKE_CXX_FLAGS="$CMAKE_CXX_FLAGS" \
+  ..
+ninja

ci/scripts/test.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+cd build
+if [ $SELF_HOST = false ]; then
+    ctest -j 4 --output-on-failure -C $BUILD_TYPE
+else
+    sudo cp libsnmallocshim.so libsnmallocshim-1mib.so /usr/local/lib/
+    ninja clean
+    LD_PRELOAD=/usr/local/lib/libsnmallocshim.so ninja
+    ninja clean
+    LD_PRELOAD=/usr/local/lib/libsnmallocshim-1mib.so ninja
+fi