Fix inconsistent indentation in scripts/

- NOT reindenting all files. Just choosing one style in files that were using multiple.

scripts/build_emscripten.sh

@@ -29,9 +29,9 @@
 set -e
 
 if test -z "$1"; then
-	BUILD_DIR="emscripten_build"
+    BUILD_DIR="emscripten_build"
 else
-	BUILD_DIR="$1"
+    BUILD_DIR="$1"
 fi
 
 docker run -v $(pwd):/root/project -w /root/project trzeci/emscripten:sdk-tag-1.39.3-64bit \