(Windows) Another try to avoid a filesystem race condition for the MinGW dependency setup script

tools/Windows_dependencies_setup_MinGW.sh

@@ -25,14 +25,14 @@ rm -rf curl*
 curl -O https://curl.se/windows/dl-8.1.2_3/curl-8.1.2_3-win64-mingw.zip
 unzip curl-8.1.2_3-win64-mingw.zip
 
-# Needed due to some kind of file system race condition that sometimes occurs on Windows.
-sleep 2
-
 if [ ! -d curl-8.1.2_3-win64-mingw ]; then
   echo "curl directory is missing, aborting."
   exit
 fi
 
+# Needed due to some kind of file system race condition that sometimes occurs on Windows.
+sleep 3
+
 mv curl-8.1.2_3-win64-mingw curl
 
 cp -p curl/bin/libcurl-x64.dll ..
@@ -43,13 +43,13 @@ rm -rf glew*
 curl -LO https://sourceforge.net/projects/glew/files/glew/2.1.0/glew-2.1.0.zip
 unzip glew-2.1.0.zip
 
-sleep 2
-
 if [ ! -d glew-2.1.0 ]; then
   echo "GLEW directory is missing, aborting."
   exit
 fi
 
+sleep 3
+
 mv glew-2.1.0 glew
 
 echo -e "\nSetting up FreeType"
@@ -129,14 +129,13 @@ curl -O https://libsdl.org/release/SDL2-devel-2.28.1-mingw.tar.gz
 
 tar xvzf SDL2-devel-2.28.1-mingw.tar.gz
 
-# Needed due to some kind of file system race condition that sometimes occurs on Windows.
-sleep 2
-
 if [ ! -d SDL2-2.28.1 ]; then
   echo "SDL directory is missing, aborting."
   exit
 fi
 
+sleep 3
+
 mv SDL2-2.28.1 SDL2
 
 mv SDL2/x86_64-w64-mingw32/include/SDL2 SDL2/
@@ -150,13 +149,13 @@ rm -rf ffmpeg*
 curl -LO https://github.com/BtbN/FFmpeg-Builds/releases/download/autobuild-2023-05-31-12-47/ffmpeg-n6.0-22-g549430e14d-win64-gpl-shared-6.0.zip
 unzip ffmpeg-n6.0-22-g549430e14d-win64-gpl-shared-6.0.zip
 
-sleep 2
-
 if [ ! -d ffmpeg-n6.0-22-g549430e14d-win64-gpl-shared-6.0 ]; then
   echo "FFmpeg directory is missing, aborting."
   exit
 fi
 
+sleep 3
+
 mv ffmpeg-n6.0-22-g549430e14d-win64-gpl-shared-6.0 ffmpeg
 
 cp -p ffmpeg/bin/avcodec-60.dll ..