More consistent types for OSAL resources

[jphickey]

Is your feature request related to a problem? Please describe.
CFE issue nasa/cFE#663 describes mismatched types used across CFE for certain items, such as stack size and priority of tasks.
To help resolve this OSAL should provide a typedef for the "right" types to use when interfacing with OSAL.

Describe the solution you'd like
Should add at least:

• osal_priority_t - type used for OSAL task priority
• osal_stackptr_t - type used for OSAL stack pointer

Additional context
This will identify the correct type to use, instead of the mishmash currently seen in CFE as described in nasa/cFE#663.

Requester Info
Joseph Hickey, Vantage Systems, Inc.

[jphickey]

Question for @skliper and @acudmore --- OSAL also (still) uses uint32 for size everywhere. We already have a typedef for cpusize aka size_t - should I also update the OSAL APIs to use cpusize instead of uint32 in the APIs that accept a size?

[jphickey]

Otherwise I can limit this to only fixing the type used for priority and the stack pointer (which only occur in a couple places).

[skliper]

I'm good with the size change also.