arm/rtl22xx_t build failures

[Chris Johns]

These failures are showing up with ARM and I think other BSPs have a similar issue. I will build the whole architecture soon and report the failures.

Failures:
   1 posix-profiling arm/rtl22xx_t build:
      configure: /opt/work/chris/rtems/kernel/rtems.git/configure --target\
      =arm-rtems4.12 --enable-rtemsbsp=rtl22xx_t --prefix=/opt/rtems/4.12\
      --enable-posix --enable-profiling

   1 profiling arm/rtl22xx_t build:
      configure: /opt/work/chris/rtems/kernel/rtems.git/configure --target\
      =arm-rtems4.12 --enable-rtemsbsp=rtl22xx_t --prefix=/opt/rtems/4.12\
      --enable-profiling

$ /build/rtems/tools/4.12/bin/arm-rtems4.12-gcc --version                                                                                                                                                                                                                                                
arm-rtems4.12-gcc (GCC) 6.3.0 20161221 (RTEMS 4.12, RSB 5feef6503362dcc47c1175c3823935263038bf2d, Newlib 2.5.0.20170323)