libpayload: increase the default heap size

Coreinfo uses the default heap size and will blow up
if the USB keyboard is used.

Change-Id: I2ffae330ec34167b2ccfbd4c428e3e8306230f44
Signed-off-by: Dave Frodin <dave.frodin@se-eng.com>
Reviewed-on: http://review.coreboot.org/1980
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Marc Jones <marcj303@gmail.com>
diff --git a/payloads/libpayload/lib/libpayload.ldscript b/payloads/libpayload/lib/libpayload.ldscript
index 43b92207..3e7d4cc 100644
--- a/payloads/libpayload/lib/libpayload.ldscript
+++ b/payloads/libpayload/lib/libpayload.ldscript
@@ -34,7 +34,7 @@
 
 ENTRY(_entry)
 
-HEAP_SIZE = 65536;
+HEAP_SIZE = 2*64*1024;
 STACK_SIZE = 16384;
 
 SECTIONS