[2020-02] [AOT] Use .short directive instead of .hword (#21419)

Co-authored-by: Marek Habersack <grendel@twistedcode.net>

Author: github-actions[bot]

mono/mini/image-writer.c

@@ -97,7 +97,7 @@
 #elif defined(TARGET_ASM_GAS) && defined(TARGET_WIN32)
 #define AS_INT16_DIRECTIVE ".word"
 #elif defined(TARGET_ASM_GAS)
-#define AS_INT16_DIRECTIVE ".hword"
+#define AS_INT16_DIRECTIVE ".short"
 #else
 #define AS_INT16_DIRECTIVE ".word"
 #endif