autotools.bbclass: print make clean

It makes us easier to see make clean failed.

(From OE-Core rev: c34d9e66a1a97952965128ab84c691202a60985b)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/autotools.bbclass

@@ -111,6 +111,7 @@ autotools_preconfigure() {
 				# regenerate them even if CFLAGS/LDFLAGS are different
 				cd ${S}
 				if [ "${CLEANBROKEN}" != "1" -a \( -e Makefile -o -e makefile -o -e GNUmakefile \) ]; then
+					echo "Running \"${MAKE} clean\" in ${S}"
 					${MAKE} clean
 				fi
 				find ${S} -name \*.la -delete