buildgcc: remove getopt when doing clean.

Change-Id: I9f59a00e735f39df813b2216290da62eea3c595d
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/11372
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

util/crossgcc/Makefile

@@ -76,6 +76,7 @@ clean_tempfiles:
 	rm -rf llvm-* clang-tools-* cfe-* compiler-rt-*
 	rm -rf acpica-*
 	rm -rf gdb-*
+	rm -f  getopt
 
 clean: clean_tempfiles
 	rm -rf xgcc