system/cnijfilter2: Respect ARCH if already set.

If ARCH was already set, we skipped the code to set the BITS prefix,
breaking the build.

Signed-off-by: Andrew Clemons <andrew.clemons@gmail.com>

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

system/cnijfilter2/cnijfilter2.SlackBuild

@@ -33,23 +33,12 @@ PKGTYPE=${PKGTYPE:-tgz}
 SRCNAM=$PRGNAM-source
 SRCVERSION=6.20-1
 
-MARCH=$( uname -m )
 if [ -z "$ARCH" ]; then
-  case "$MARCH" in
-    i?86) export ARCH=i586 
-          export SLKCFLAGS="-O2 -march=i586 -mtune=i686"
-          export LIBDIRSUFFIX=""
-          BITS="i686";;
-    x86_64) export ARCH=x86_64
-            export SLKCFLAGS="-O2 -fPIC"
-            export LIBDIRSUFFIX="64"
-            BITS="x86_64" ;;
-    aarch64) export ARCH=aarch64
-             export SLKCFLAGS="-O2 -fPIC"
-             export LIBDIRSUFFIX="64"
-             BITS="aarch64" ;;
-    *) echo "Package for $MARCH architecture is not available."
-       exit 1 ;;
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    aarch64) ARCH=aarch64 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
   esac
 fi
 
@@ -65,6 +54,31 @@ TMP=${TMP:-/tmp/SBo}
 PKG=$TMP/package-$PRGNAM
 OUTPUT=${OUTPUT:-/tmp}
 
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  LIBDIRSUFFIX=""
+  BITS="i686"
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+  BITS="i686"
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+  BITS="x86_64"
+elif [ "$ARCH" = "aarch64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+  BITS="aarch64"
+else
+  echo "Package for $ARCH architecture is not available."
+  exit 1
+fi
+
+export ARCH
+export SLKCFLAGS
+export LIBDIRSUFFIX
+
 set -e
 
 rm -rf $PKG