powerpc-utils.spec: Fix typo in spec-file
powerpc-utils.spec: Fix typo in spec-file

In line:
%{__rm} -rf $RPM_BULD_ROOT
The directory should be RPM_BUILD_ROOT not RPM_BULD_ROOT

Signed-off-by: Chandni Verma <dad063f8ade782763c74e4953e61405f236df268@linux.vnet.ibm.com>

shenki/powerpc-utils,shenki/powerpc-utils,shenki/powerpc-utils