nova: update kernel branch to avoid tlb issues

Following page fault sympton in core gets fixed:

PAGE-FAULT IN CORE (WRITE pf_addr=1000000 pf_ip=14361c from 00 <NULL>)

stack pointer 0xa01fec30, qualifiers 0x6 irUWp

faulter utcb a01ff000, last message item count 1

0 - type=1 rights=0x3 region=0x1000000+0x1000000 hotspot 0(801) - delegated

   1 a01fec30 0014361c
   2 a01fec68 001401d5

repos/base-nova/ports/nova.hash

@@ -1 +1 @@
-3a12394d16e4cf40f93b5fdcab8798b66dcb51e0
+45d0d8368d87e015ad426e9e0f3b70dee64a0da8

repos/base-nova/ports/nova.port

@@ -2,9 +2,9 @@ LICENSE   := GPLv2
 VERSION   := git
 DOWNLOADS := nova.git
 
-# r9 branch
+# r9 branch - use r9_debug for more verbose kernel messages
 URL(nova) := https://github.com/alex-ab/NOVA.git
-REV(nova) := 153d91d78655ad742a1119efa183aca32f728817
+REV(nova) := 44884114e25ff6e730489a034da3278749070931
 DIR(nova) := src/kernel/nova
 
 PATCHES   := $(wildcard $(REP_DIR)/patches/*.patch)

repos/base-nova/src/kernel/target.mk

@@ -13,7 +13,7 @@ CC_WARN          = -Wall -Wextra -Waggregate-return -Wcast-align -Wcast-qual \
                    -Wpointer-arith -Wredundant-decls -Wshadow -Wwrite-strings \
                    -Wabi -Wctor-dtor-privacy -Wno-non-virtual-dtor \
                    -Wold-style-cast -Woverloaded-virtual -Wsign-promo \
-                   -Wframe-larger-than=112 -Wlogical-op -Wstrict-null-sentinel \
+                   -Wlogical-op -Wstrict-null-sentinel \
                    -Wstrict-overflow=5 -Wvolatile-register-var
 CC_OPT          += -pipe \
                    -fdata-sections -fomit-frame-pointer -freg-struct-return \
@@ -21,9 +21,11 @@ CC_OPT          += -pipe \
                    -fno-stack-protector -fvisibility-inlines-hidden \
                    -fno-asynchronous-unwind-tables -std=gnu++0x 
 ifeq ($(filter-out $(SPECS),32bit),)
+CC_WARN         += -Wframe-larger-than=64
 CC_OPT          += -mpreferred-stack-boundary=2 -mregparm=3
 else
 ifeq ($(filter-out $(SPECS),64bit),)
+CC_WARN         += -Wframe-larger-than=128
 CC_OPT          += -mpreferred-stack-boundary=4 -mcmodel=kernel -mno-red-zone
 else
 $(error Unsupported environment)