Use script to start size calculation #1714

Use the same way it is done in windows.

Author: jan

io.sloeber.core/src/io/sloeber/core/api/CompileDescription.java

@@ -221,10 +221,7 @@ public String getCustomSizeCommand() {
 		public String getEnvValue() {
 			switch (this) {
 			case ARDUINO_WAY:
-				if (isWindows) {
-					return Common.makeEnvironmentVar(ENV_KEY_BUILD_PATH) + SLACH + ARDUINO_SIZE;
-				}
-				return "${sloeber.size_command.awk}"; //$NON-NLS-1$
+				return Common.makeEnvironmentVar(ENV_KEY_BUILD_PATH) + SLACH + ARDUINO_SIZE;
 			case AVR_ALTERNATIVE:
 				return "${sloeber.size_command.avr}"; //$NON-NLS-1$
 			case RAW_RESULT:

io.sloeber.core/src/io/sloeber/core/builder/SloeberBuilderExtension.java

@@ -130,9 +130,6 @@ public SloeberBuilderExtension() {
 
 	@SuppressWarnings("nls")
 	private static void generateArduinoSizeCommandFile(IAutoBuildConfigurationDescription autoBuildConfData) {
-		if(!isWindows) {
-			return;
-		}
 		IFile sizeCommandIFile = autoBuildConfData.getBuildFolder().getFile(ARDUINO_SIZE );
 		SloeberConfiguration confDesc = SloeberConfiguration.getFromAutoBuildConfDesc(autoBuildConfData);