[AVR] Use 2-byte alignment for 16-bit and wider types, 1-byte alignment for

everything else.
(avr-rust/rust-legacy-fork#63)

Author: gergoerdi

lib/Target/AVR/AVRTargetMachine.cpp

@@ -25,7 +25,7 @@
 
 namespace llvm {
 
-static const char *AVRDataLayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-n8";
+static const char *AVRDataLayout = "e-p:16:16-i8:8-i16:16-i32:16-i64:16-f32:16-f64:16-n8-a:16";
 
 /// Processes a CPU name.
 static StringRef getCPU(StringRef CPU) {