tools: bpf: remove feature detection output

bpf tools use feature detection for libbfd dependency, clean up
the output files on make clean.
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>

tools/bpf/Makefile

@@ -81,6 +81,8 @@ clean: bpftool_clean
 	$(call QUIET_CLEAN, bpf-progs)
 	$(Q)rm -rf $(OUTPUT)*.o $(OUTPUT)bpf_jit_disasm $(OUTPUT)bpf_dbg \
 	       $(OUTPUT)bpf_asm $(OUTPUT)bpf_exp.yacc.* $(OUTPUT)bpf_exp.lex.*
+	$(call QUIET_CLEAN, core-gen)
+	$(Q)rm -f $(OUTPUT)FEATURE-DUMP.bpf
 
 install: $(PROGS) bpftool_install
 	$(call QUIET_INSTALL, bpf_jit_disasm)

tools/bpf/bpftool/Makefile

@@ -89,6 +89,8 @@ $(OUTPUT)%.o: %.c
 clean: $(LIBBPF)-clean
 	$(call QUIET_CLEAN, bpftool)
 	$(Q)$(RM) $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
+	$(call QUIET_CLEAN, core-gen)
+	$(Q)$(RM) $(OUTPUT)FEATURE-DUMP.bpftool
 
 install: $(OUTPUT)bpftool
 	$(call QUIET_INSTALL, bpftool)