configure: Assure existence of linux-headers/ build directory

Commit ec5b06d (configure: ensure directory exists when creating symlinks)
moved the creation of directories into the symlink() function but forgot
the case where no symlink is created.

This leads to build errors on arm Linux due to -I../linux-headers.

Unbreak the build on arm Linux by reverting part of that commit.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

diff --git a/configure b/configure
index 37faee4..f575279 100755 (executable)
--- a/configure
+++ b/configure
@@ -3491,6 +3491,7 @@ done
 
 # use included Linux headers
 if test "$linux" = "yes" ; then
+  mkdir -p linux-headers
   case "$cpu" in
   i386|x86_64)
     symlink "$source_path/linux-headers/asm-x86" linux-headers/asm