[X11] Reconcile logical keyboard state with physical state on FocusIn

since the window system doesn't do it for us like other platforms.

This prevents sticky keys and missed keys when going in and out
of focus, for example Alt would appear to stick if switching away
from an SDL app with Alt-Tab and had to be pressed again.

CR: Sam

build-scripts/androidbuild.sh

@@ -0,0 +1,135 @@
+#!/bin/bash
+
+SOURCES=()
+MKSOURCES=""
+CURDIR=`pwd -P`
+
+# Fetch sources
+if [[ $# -ge 2 ]]; then
+    for src in ${@:2}
+    do
+        SOURCES+=($src)
+        MKSOURCES="$MKSOURCES $(basename $src)"
+    done
+else
+    if [ -n "$1" ]; then
+        while read src
+        do
+            SOURCES+=($src)
+            MKSOURCES="$MKSOURCES $(basename $src)"
+        done
+    fi
+fi
+
+if [ -z "$1" ] || [ -z "$SOURCES" ]; then
+    echo "Usage: androidbuild.sh com.yourcompany.yourapp < sources.list"
+    echo "Usage: androidbuild.sh com.yourcompany.yourapp source1.c source2.c ...sourceN.c"
+    echo "To copy SDL source instead of symlinking: COPYSOURCE=1 androidbuild.sh ... "
+    echo "You can pass additional arguments to ndk-build with the NDKARGS variable: NDKARGS=\"-s\" androidbuild.sh ..."
+    exit 1
+fi
+
+
+
+SDLPATH="$( cd "$(dirname "$0")/.." ; pwd -P )"
+
+NDKBUILD=`which ndk-build`
+if [ -z "$NDKBUILD" ];then
+    echo "Could not find the ndk-build utility, install Android's NDK and add it to the path"
+    exit 1
+fi
+
+ANDROID=`which android`
+if [ -z "$ANDROID" ];then
+    echo "Could not find the android utility, install Android's SDK and add it to the path"
+    exit 1
+fi
+
+ANT=`which ant`
+
+if [ -z "$ANT" ];then
+    echo "Could not find the ant utility, install Android's SDK and add it to the path"
+    exit 1
+fi
+
+NCPUS="1"
+case "$OSTYPE" in
+    darwin*)
+        NCPU=`sysctl -n hw.ncpu`
+        ;; 
+    linux*)
+        if [ -n `which nproc` ]; then
+            NCPUS=`nproc`
+        fi  
+        ;;
+  *);;
+esac
+
+APP="$1"
+APPARR=(${APP//./ })
+BUILDPATH="$SDLPATH/build/$APP"
+
+# Start Building
+
+rm -rf $BUILDPATH
+mkdir -p $BUILDPATH
+
+cp -r $SDLPATH/android-project/* $BUILDPATH
+
+# Copy SDL sources
+mkdir -p $BUILDPATH/jni/SDL
+if [ -z "$COPYSOURCE" ]; then
+    ln -s $SDLPATH/src $BUILDPATH/jni/SDL
+    ln -s $SDLPATH/include $BUILDPATH/jni/SDL
+else
+    cp -r $SDLPATH/src $BUILDPATH/jni/SDL
+    cp -r $SDLPATH/include $BUILDPATH/jni/SDL
+fi
+
+cp -r $SDLPATH/Android.mk $BUILDPATH/jni/SDL
+sed -i "s|YourSourceHere.c|$MKSOURCES|g" $BUILDPATH/jni/src/Android.mk
+sed -i "s|org\.libsdl\.app|$APP|g" $BUILDPATH/AndroidManifest.xml
+
+# Copy user sources
+for src in "${SOURCES[@]}"
+do
+    cp $src $BUILDPATH/jni/src
+done
+
+# Create an inherited Activity
+cd $BUILDPATH/src
+for folder in "${APPARR[@]}"
+do
+    mkdir -p $folder
+    cd $folder
+done
+
+ACTIVITY="${folder}Activity"
+sed -i "s|SDLActivity|$ACTIVITY|g" $BUILDPATH/AndroidManifest.xml
+sed -i "s|SDLActivity|$APP|g" $BUILDPATH/build.xml
+
+# Fill in a default Activity
+echo "package $APP;" >  "$ACTIVITY.java"
+echo "import org.libsdl.app.SDLActivity;" >> "$ACTIVITY.java"
+echo "public class $ACTIVITY extends SDLActivity {}" >> "$ACTIVITY.java"
+
+# Update project and build
+cd $BUILDPATH
+android update project --path $BUILDPATH
+$NDKBUILD -j $NCPUS $NDKARGS
+$ANT debug
+
+cd $CURDIR
+
+APK="$BUILDPATH/bin/$APP-debug.apk"
+
+if [ -f "$APK" ]; then
+    echo "Your APK is ready at $APK"
+    echo "To install to your device: "
+    echo "cd  $BUILDPATH"
+    echo "ant debug install"
+    exit 0
+fi
+
+echo "There was an error building the APK"
+exit 1