Currently, MAKEALL always reports "Configure: OK" and "Compile: OK"
regardless of the result of the configuration and compile.

$ LANG=C CROSS_COMPILE=arm-linux-gnueabi- ./MAKEALL -a arm foo_defconfig
Building arm foo_defconfig
make[2]: *** [foo_defconfig] Error 1
make[1]: *** [foo_defconfig] Error 2
make: *** [foo_defconfig] Error 2
Configure: OK
***
*** Configuration file ".config" not found!
***
*** Please run some configurator (e.g. "make oldconfig" or
*** "make menuconfig" or "make xconfig").
***
make[3]: *** [silentoldconfig] Error 1
make[2]: *** [silentoldconfig] Error 2
make[1]: *** No rule to make target `include/config/auto.conf',
needed by `include/config/kernel.release'.  Stop.
make[1]: *** Waiting for unfinished jobs....
make: *** [_all] Error 2
Compile: OK
arm-linux-gnueabi-size: 'makeall_builddir/barebox': No such file
Compiled in    2s

The check_pipe_status() function must be called right after "make"
command, not "printf" command.  ("printf" probably succeeds all
the time.)

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>