create directory before writing into the file.

The with open() method creates the file if it does not exist, but
gives a FileNotFound error if the path does not exist.

Hence, creating the path directories before using the file.

Bug: N/A
Test: the build passes.
Change-Id: Id5b285ea5581f7ef526876fb6e13a3bf69098acd

build/mainline_modules_sdks.py

@@ -1307,6 +1307,7 @@ class SdkDistProducer:
 
     def dist_generate_sdk_supported_modules_file(self, modules):
         sdk_modules_file = os.path.join(self.dist_dir, "sdk-modules.txt")
+        os.makedirs(os.path.dirname(sdk_modules_file), exist_ok=True)
         with open(sdk_modules_file, "w", encoding="utf8") as file:
             for module in modules:
                 if module in MAINLINE_MODULES: