[tests] properly check symbols on PPC64

Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>

libnozzle/tests/api-test-coverage

@@ -12,7 +12,10 @@ builddir="$2"/libnozzle
 
 headerapicalls="$(grep nozzle_ "$srcdir"/libnozzle.h | grep -v "^ \*" | grep -v ^struct | grep -v "^[[:space:]]" | grep -v typedef | sed -e 's/(.*//g' -e 's/^const //g' -e 's/\*//g' | awk '{print $2}')"
 
-exportedapicalls="$(nm -B -D "$builddir"/.libs/libnozzle.so | grep ' T ' | awk '{print $3}')"
+# The PowerPC64 ELFv1 ABI defines the address of a function as that of a
+# function descriptor defined in .opd, a data (D) section.  Other ABIs
+# use the entry address of the function itself in the text (T) section.
+exportedapicalls="$(nm -B -D "$builddir"/.libs/libnozzle.so | grep ' [DT] ' | awk '{print $3}')"
 
 echo "Checking for exported symbols NOT available in header file"