meson: skip trailing dot if any + more posix compliant

meson/evas_loader_conf.sh

@@ -1,15 +1,19 @@
 #!/bin/sh
 
-original_loader=$1
-filename="$(basename $original_loader)"
 ext="${ext##*.}"
-original_name="$(basename $original_loader .$ext)"
-loader_dir="$(dirname $original_loader)"
-loader="$(basename $original_loader)"
-loader_name="$(echo $original_name | cut -f 1 -d '.')"
+# skip trailing dot if any
+case "$1" in 
+    *.) original_loader=${1%?};;
+    *) original_loader=$1;;
+esac
+original_name="$(basename "$original_loader")"
+loader_dir="$(dirname "$original_loader")"
+loader="$(basename "$original_loader")"
+loader_name="$(echo "$loader" | cut -f 1 -d '.')"
 
-if test `echo -n ${original_loader} | tail -c 3` = "$ext"; then
-  mv "$DESTDIR"/"$original_loader" "$DESTDIR"/"$loader_dir"/"$original_name"
+original_ext="$(echo "$loader" | tail -c 4)"
+if test "$original_ext" = "$ext" ; then
+    mv "$DESTDIR"/"$original_loader" "$DESTDIR"/"$loader_dir"/"$original_name"
 fi
 
 shift