Increase TCG_MAX_TEMPS from 512 to 1024.

The MIPS emulator crashes during boot because tcg runs out of
temps.  Increasing TCG_MAX_TEMPS allows the MIPS emulator to
boot completely.

The public version of qemu seems to have TCG_MAX_TEMPS set
to 2048, so increasing this value in our qemu branch seems
reasonable.

I tried increasing to 768, but that just allowed the boot
process to get farther before crashing.

I tested the x86 qemu (on Windows) to see if the additional
temps increased the emulator's memory usage.  I did not
see any change in memory usage.  The x86 memory usage is very
close to the public version of the emulator.

With 1024 temps, the MIPS qemu seems to use slightly more than
the public version of the MIPS emulator.  Since the emulator
won't boot without the increased temps, I can't tell if the
additional memory is caused by the increased temps or something
else that has changed since the last public release.

Change-Id: I33a78f1111fa769c5f79f46e21acdd08bfa11898

Author: brentwa

tcg/tcg.h

@@ -164,7 +164,7 @@ typedef struct TCGPool {
 
 #define TCG_MAX_LABELS 512
 
-#define TCG_MAX_TEMPS 512
+#define TCG_MAX_TEMPS 1024
 
 /* when the size of the arguments of a called function is smaller than
    this value, they are statically allocated in the TB stack frame */