test: also test with -O3 which can produce extra errors

.woodpecker/test-mem.yml

@@ -14,5 +14,7 @@ pipeline:
     pull: true
     commands:
       - make test-mem
+      - make clean
+      - make test-mem CFLAGS='-O3 -Werror -Wall'
     when:
       event: [push, pull_request]

.woodpecker/test.yml

@@ -11,19 +11,12 @@ branches:
 platform: ${PLATFORM}
 
 pipeline:
-  build:
+  build-and-test:
     image: *image
     pull: true
-    commands:
-      - make
-      - make clean
-      - CFLAGS='-O3' make
-    when:
-      event: [push, pull_request]
-
-  test:
-    image: *image
     commands:
       - make test
+      - make clean
+      - make test CFLAGS='-O3 -Werror -Wall'
     when:
       event: [push, pull_request]