build system: fix breakage affecting MSYS2 build

Upstream changes to the embedded_scripts and mkconfigs scripts
resulted in busybox-w32 failing to build with MSYS2.

bzip2 in MSYS2 detects stdout redirected to /dev/null as a terminal
and returns a non-zero exit status.  Since the test is only for
the existence of bzip2, not its functionality, even an exit status
of 1 is OK.  Only fail if the exit status is 127.

1 files changed, 2 insertions, 2 deletions

diff --git a/scripts/embedded_scripts b/scripts/embedded_scripts
index 8407c1f78..88c3a13cb 100755
--- a/scripts/embedded_scripts
+++ b/scripts/embedded_scripts
@@ -23,8 +23,8 @@ if test $? != 0; then
         exit 1
 fi
 
-bzip2 </dev/null >/dev/null
-if test $? != 0; then
+bzip2 </dev/null >/dev/null 2>&1
+if test $? = 127; then
         echo 'bzip2 is not installed'
         exit 1
 fi