[typemaps] Fix a log statement which may lead to segfault when used

[grendello]

Fixes: #4596
Context: a017561
Context: https://gist.github.com/pjcollins/87762e81f1f3c7e8b821356e4612eecf

A missing parameter in a call to log_debug added in a017561 may lead
to a segfault when assembly log category and debug log level are
enabled:

	F libc    : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3 in tid 922 (DrawableTinting), pid 922 (DrawableTinting)
	I crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone
	I /system/bin/tombstoned: received crash request for pid 922
	I crash_dump64: performing dump of process 922 (target tid = 922)
	F DEBUG   : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
	F DEBUG   : Build fingerprint: 'Android/sdk_phone_x86_64/generic_x86_64:9/PSR1.180720.012/4923214:userdebug/test-keys'
	F DEBUG   : Revision: '0'
	F DEBUG   : ABI: 'x86_64'
	F DEBUG   : pid: 922, tid: 922, name: DrawableTinting  >>> com.xamarin.DrawableTinting <<<
	F DEBUG   : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3
	F DEBUG   : Cause: null pointer dereference
	F DEBUG   :     rax 0000000000000000  rbx 00007ffed3c283c0  rcx 0000000000000003  rdx 0000000000000002
	F DEBUG   :     r8  00007ffed3c283c0  r9  00000000ffffffff  r10 00007ffed3c283d0  r11 00007ffed3c28824
	F DEBUG   :     r12 00007c88774a2f17  r13 00000000ffffffff  r14 0000000000000000  r15 00007ffed3c283d0
	F DEBUG   :     rdi 0000000000000003  rsi 00007ffed3c283bb
	F DEBUG   :     rbp 00007ffed3c28f18  rsp 00007ffed3c28288  rip 00007c890f860761
	F DEBUG   :
	F DEBUG   : backtrace:
	F DEBUG   :     #00 pc 0000000000020761  /system/lib64/libc.so (strlen+17)
	F DEBUG   :     #01 pc 000000000006e761  /system/lib64/libc.so (__vfprintf+5953)
	F DEBUG   :     #02 pc 000000000008df5d  /system/lib64/libc.so (vsnprintf+189)
	F DEBUG   :     #03 pc 0000000000007b60  /system/lib64/liblog.so (__android_log_vprint+64)
	F DEBUG   :     #04 pc 000000000001350c  /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (log_debug_nocheck(_LogCategories, char const*, ...)+204)
	F DEBUG   :     #05 pc 000000000000de6a  /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(char const*)+538)
	F DEBUG   :     #06 pc 000000000000df13  /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(_MonoString*)+99)
	F DEBUG   :     #07 pc 00000000000d57f8  <anonymous:0000000042d04000>

Add the missing parameter to prevent the SIGSEGV from happening.