Use system libcurl.so

lib/lib.pri

@@ -21,5 +21,5 @@ unix:!ios:!android {
         $${PWD}/AppImageUpdate-prebuilt/lib/zsync2/lib/libzsync/libzsync.a \
         $${PWD}/AppImageUpdate-prebuilt/lib/zsync2/lib/librcksum/librcksum.a
 
-    LIBS += -L$${PWD}/AppImageUpdate-prebuilt/lib/ -lcurl
+    LIBS += -lcurl
 }

scripts/import.sh

@@ -14,6 +14,6 @@ fi
 if [ ! -d "${PROJDIR}/lib/AppImageUpdate-prebuilt" ]; then
     mkdir "${PROJDIR}/lib/AppImageUpdate-prebuilt"
     cd "${PROJDIR}/lib/AppImageUpdate-prebuilt"
-    cmake "${PROJDIR}/lib/AppImageUpdate" -DUSE_SYSTEM_CURL=OFF -DBUILD_CPR_TESTS=OFF -DCMAKE_BUILD_TYPE=RelWithDebInfo
+    cmake "${PROJDIR}/lib/AppImageUpdate" -DUSE_SYSTEM_CURL=ON -DBUILD_CPR_TESTS=OFF -DCMAKE_BUILD_TYPE=RelWithDebInfo
     make libappimageupdate
 fi