[AD] CPU feature detection.

[AJ <aj@xxxxxxxxxx>]

cpu detection for  SSSE3, SSE4.1 SSE4.2
which are found on the 'Core'  series of Intel CPUs


sorry for the state of my 'diff' output, im too retarded to use diff 
properly.
and/or the version of diff i did use showed something quite different to 
other recent patches, so even if i did use it, it'd not be in a format 
not too friendly to use.



allegro/src/i386/icpu.c

	cpu_capabilities |= (reg[2] & 0x00000001 ? CPU_SSE3 : 0);

+	cpu_capabilities |= (reg[2] & 0x00000200 ? CPU_SSSE3 : 0);
+	cpu_capabilities |= (reg[2] & 0x00080000 ? CPU_SSE41 : 0);
+	cpu_capabilities |= (reg[2] & 0x00100 000 ? CPU_SSE42 : 0);

	cpu_capabilities |= (reg[3] & 0x40000000 ? CPU_IA64 : 0);