* gdb.disasm/hppa.mt (hppa), gdb.stabs/hppa.mt (weird.o): Check

for HP assembler versus GNU assembler based on actual behavior of
	$(CC), rather than assuming that $(AS) is always the GNU assembler.

gdb/testsuite/gdb.disasm/hppa.mt

@@ -1,5 +1,14 @@
 EXECUTABLES = hppa
 hppa: hppa.s
-	$(AS) $(ASFLAGS) $(srcdir)/hppa.s -o hppa.o
-	$(CC) $(CFLAGS) $(LDFLAGS) -o hppa hppa.o $(LIBS)
+	if $(CC) -c $(srcdir)/hppa.s 2>errs; then \
+	  $(CC) $(CFLAGS) $(LDFLAGS) -o hppa hppa.o $(LIBS); \
+	  true; \
+	else \
+	  if grep 'Opcode not defined - DIAG' errs \
+	      >/dev/null; then \
+	    echo HP assembler in use--skipping disasm tests; true; \
+	  else \
+	    cat errs; false; \
+	  fi; \
+	fi