LinuxGpioDriver Minor Bug

[arizvi786]

F´ Version	Latest in devel
Affected Component	Drv/LinuxGpioDriver

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Problem Description

Fix typo in this line: https://github.com/nasa/fprime/blob/devel/Drv/LinuxGpioDriver/LinuxGpioDriverComponentImpl.cpp#L378. It should be replaced with just char buf[MAX_BUF];.

How to Reproduce

Code inspection

Expected Behavior

Currently there's no apparent issue at runtime since buf is only used in a debug print, but it should be fixed to be an array or chars rather than an array of char pointers.

[arizvi786]

@LeStarch also it was mentioned to me from @dkogan that this file seems to be based off of https://developer.ridgerun.com/wiki/index.php?title=Gpio-int-test.c which is fine, but it may be better to include the original copyright.