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.
