[RTEMS Project] #4437: powerpc/shared/sbrk.c: Do not reference errno

[RTEMS trac]

#4437: powerpc/shared/sbrk.c: Do not reference errno
----------------------------+--------------------
  Reporter:  Joel Sherrill  |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  normal         |  Milestone:  6.1
 Component:  bsps           |    Version:  6
  Severity:  normal         |   Keywords:
Blocked By:                 |   Blocking:
----------------------------+--------------------
 Using errno implicitly references the newlib reentrancy structure.
 Changing this eliminates one reason the reentrancy code may be pulled into
 minimum.exe.

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Ticket URL: <http://devel.rtems.org/ticket/4437>
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