adb: increase the file number limit

At least in kernel packages for aarch64 we were running into
the 8000 file hard limit in linux-devel. Increase it until we
have a better solution in place.

src/apk_adb.h

@@ -93,7 +93,7 @@ struct adb_data_package {
 #define APK_MAX_PKG_REPLACES		32
 #define APK_MAX_PKG_TRIGGERS		32
 #define APK_MAX_INDEX_PACKAGES		20000
-#define APK_MAX_MANIFEST_FILES		8000
+#define APK_MAX_MANIFEST_FILES		12000
 #define APK_MAX_MANIFEST_PATHS		6000
 
 extern const struct adb_object_schema