Fix Windows 7 support (#19)

This change pays off technical debt with the function -> DLL mappings in
libc/nt/master.sh, which was originally defined based on binary analysis
on Windows 10. It's now been updated so the kernel32/kernelbase/advapi32
imports should be exactly as they are written, on the MSDN documentation
and that wouldn't have been easy without Geoff Chappell's work thank him

https://www.geoffchappell.com/studies/windows/win32/index.htm

examples/examples.mk

@@ -51,7 +51,6 @@ EXAMPLES_DIRECTDEPS =						\
 	LIBC_LOG_ASAN						\
 	LIBC_MEM						\
 	LIBC_NEXGEN32E						\
-	LIBC_NT_KERNELBASE					\
 	LIBC_NT_NTDLL						\
 	LIBC_NT_USER32						\
 	LIBC_NT_WS2_32						\