CI: Fix DEBUG_STRICT definition for Coverity

The DEBUG_STRICT define needs to be passed as part of `DEBUG`, not as a bare
parameter.
diff --git a/.github/workflows/coverity.yml b/.github/workflows/coverity.yml
index 4eae219..78d98bc 100644
--- a/.github/workflows/coverity.yml
+++ b/.github/workflows/coverity.yml
@@ -17,7 +17,7 @@
       COVERITY_SCAN_PROJECT_NAME: 'Haproxy'
       COVERITY_SCAN_BRANCH_PATTERN: '*'
       COVERITY_SCAN_NOTIFICATION_EMAIL: 'chipitsine@gmail.com'
-      COVERITY_SCAN_BUILD_COMMAND: "make CC=clang DEFINE=-DDEBUG_USE_ABORT TARGET=linux-glibc USE_ZLIB=1 USE_PCRE=1 USE_PCRE_JIT=1 USE_LUA=1 USE_OPENSSL=1 USE_SYSTEMD=1 USE_WURFL=1 WURFL_INC=contrib/wurfl WURFL_LIB=contrib/wurfl USE_DEVICEATLAS=1 DEVICEATLAS_SRC=contrib/deviceatlas USE_51DEGREES=1 51DEGREES_SRC=contrib/51d/src/pattern DEBUG_STRICT=1"
+      COVERITY_SCAN_BUILD_COMMAND: "make CC=clang DEBUG='-DDEBUG_STRICT=1 -DDEBUG_USE_ABORT=1' TARGET=linux-glibc USE_ZLIB=1 USE_PCRE=1 USE_PCRE_JIT=1 USE_LUA=1 USE_OPENSSL=1 USE_SYSTEMD=1 USE_WURFL=1 WURFL_INC=contrib/wurfl WURFL_LIB=contrib/wurfl USE_DEVICEATLAS=1 DEVICEATLAS_SRC=contrib/deviceatlas USE_51DEGREES=1 51DEGREES_SRC=contrib/51d/src/pattern"
     steps:
     - uses: actions/checkout@v2
     - name: Install apt dependencies