add lldb scripts to fix boot delay and bypass the secure root check

Author: zhuowei

fixbootdelay_lldbscript_doc.txt

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+At boot, XNU waits 30 seconds for an RTC device, using IOService::resourceMatching("IORTC") and waitForService.
+
+We patch the two calls to waitForService - the first in IOKitInitializeTime and the second in AppleARMPE::getGMTTimeOfDay to wait for 1 second instead.
+
+XNU also waits to check if the root device is secure in IOSecureBSDRoot with a call to pe->callPlatformFunction. This call hangs,
+so the last breakpoint breaks just before the call, skips it, and pretend it returned true.
+
+The included offsets are for the iPhone X iOS 12 beta 4 kernelcache.

lldbit.sh

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+#!/bin/sh
+# from xnu's README.md
+exec lldb lz_comp2/kcache_out.bin -o "process connect --plugin gdb-remote connect://127.0.0.1:1234" -s lldbscript.lldb

lldbscript.lldb

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+b *0xFFFFFFF007433BE8
+breakpoint command add
+print $x1=1000000000
+c
+DONE
+b *0xFFFFFFF005FA5D84
+breakpoint command add
+print ((uint32_t*)0xFFFFFFF0058083A8)[0] = 1
+c
+DONE
+b *0xfffffff00743e434
+breakpoint command add
+print $pc=0xfffffff00743e438
+print $x0=1
+c
+DONE
+b *0xfffffff00743e834