fix(pfile): Fix warnings in ununpack and wget

[GMishx]

Description

• Due to recent changes, ununpack agent and wget agent were generating following warnings:

utils.c: In function ‘DisplayContainerInfo’:
utils.c:1580:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result]
       fscanf(file, "%64s", SHA256);
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

wget_agent.c: In function ‘DBLoadGold’:
wget_agent.c:117:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result]
     fscanf(file, "%64s", SHA256);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Also, if the file path contains any special characters, the call to sha256sum fails.

Changes

1. Fix the warnings in ununpack agent and wget agent due to ignored return value of fscanf.
2. Remove unnecessary includes in utils.c
3. Enclose the file path in ' ' quotes to accommodate special characters in file path.

[shaheemazmalmmd]

Code looks good.