Add PSP host.

ci/psp/Dockerfile

@@ -0,0 +1,3 @@
+FROM pspdev/pspdev
+RUN apk add --update --no-cache python3 && ln -sf python3 /usr/bin/python
+RUN psp-pacman -Sy pspgl glm

ci/psp/docker-compose.yml

@@ -0,0 +1,14 @@
+services:
+  dawn-psp:
+    build: .
+    volumes:
+      - ./../../:/Dawn
+    working_dir: /Dawn
+    command:
+      - /bin/bash
+      - -c
+      - |
+        mkdir -p ./build/psp
+        cd ./build/psp
+        psp-cmake ../.. -DDAWN_BUILD_SYSTEM=psp -DCMAKE_BUILD_TYPE=Debug
+        make