ARM: fix build with TI compiler

The TI compiler defines __eabi__ to signal that ARM EABI is in use.
We must check for this in addition to the gcc macro __ARM_EABI__.

Originally committed as revision 23804 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/arm/asm-offsets.h

@@ -29,7 +29,7 @@
 #endif
 
 /* MpegEncContext */
-#ifdef __ARM_EABI__
+#if defined(__ARM_EABI__) || defined(__eabi__)
 #define Y_DC_SCALE               0xa54
 #define C_DC_SCALE               0xa58
 #define AC_PRED                  0xa80