Squashed commit of the following:

tools/configure.c: Add missing '\n' in printf statement

    tools/configure.c: Add missed -g option to getopt() string

    tools/configure.c and tools/configure.sh:  Fix Windows native pre-build kconfig-conf incompability.  Looks like prebuilt Windows native kconfig-conf interprets "..\apps" as "..apps" (possibly '\a' as escape-sequence) so expand winnative path to double-backslashed variant "..\\apps".

    tools/mkdeps.c:  Fix '\0' missing in MinGW.  Implicit bug. There are 2 cases.

    1. Under Linux.  The code works as planned: '\n' is always replaced with '\0' due to sprintf fills n-1 bytes and reaches buffer length limit.

    2. Under Windows/MinGW. There is memory corruption.  Seems like it`s a bug inside MinGW/snprintf.  Snprintf fills consecutively "oldbase",' ',"str",'\n', but does not inserts trailing '\0' instead of '\n'.  And when next append() occurs, strlen() returns garbage-appended "oldbase".

    So the fix just removes '\n' and reserves space for '\0'.

    tools/link.bat: Fix .fakelink creation

    configs/Makefile and tools/Config.mk:  Move single file copy to the new function COPYFILE.  This fixes the Windows native build case when there is no cp or cp does not recognize Windows paths.

tools/link.bat

@@ -89,7 +89,7 @@ goto :End
 )
 
 xcopy %src% %link% /c /q /s /e /y /i
-echo FAKELNK > include\apps\.fakelnk
+echo FAKELNK > %link%\.fakelnk
 goto :End
 
 :ShowUsage