Merge pull request arduino#1814 from HeMan/master

Update for newer avr-gcc. (solves arduino#1807)

Author: cmaglie

app/src/processing/app/debug/Compiler.java

@@ -547,7 +547,7 @@ static private List getCommandCompilerS(String avrBasePath, List includePaths,
       avrBasePath + "avr-gcc",
       "-c", // compile, don't link
       "-g", // include debugging info (so errors include line numbers)
-      "-assembler-with-cpp",
+      "-x","assembler-with-cpp",
       "-mmcu=" + boardPreferences.get("build.mcu"),
       "-DF_CPU=" + boardPreferences.get("build.f_cpu"),      
       "-DARDUINO=" + Base.REVISION,