gitlab-ci: Correctly run AddressSanitizer with cmake

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit bc19f892eb)

.gitlab-ci.yml

@@ -66,8 +66,7 @@ fedora/address-sanitizer:
   image: $CI_REGISTRY/$BUILD_IMAGES_PROJECT:$FEDORA_BUILD
   script:
   - mkdir -p obj && cd obj && cmake
-    -DCMAKE_C_FLAGS="-O2 -g -fsanitize=address"
-    -DCMAKE_LINK_FLAGS="-fsanitize=address -static-libasan"
+    -DCMAKE_BUILD_TYPE=AddressSanitizer
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON --DWITH_PCAP=ON
     -DUNIT_TESTING=ON .. &&
     make -j$(nproc) && ctest --output-on-failure