Bug#17270 - mysql client tool could not find ../share/charsets folder and fails.

- Define and pass compile time path variables as pre-processor definitions to 
  mimic the makefile build.
- Set new CMake version and policy requirements explicitly.
- Changed DATADIR to MYSQL_DATADIR to avoid conflicting definition in 
  Platform SDK header ObjIdl.h which also defines DATADIR.

include/config-netware.h

@@ -110,7 +110,7 @@ extern "C" {
 #define DEFAULT_BASEDIR       "sys:/"
 #define SHAREDIR              "share/"
 #define DEFAULT_CHARSET_HOME  "sys:/mysql/"
-#define DATADIR               "data/"
+#define MYSQL_DATADIR         "data/"
 
 /* 64-bit file system calls */
 #define SIZEOF_OFF_T          8

include/config-win.h

@@ -303,13 +303,15 @@ inline ulonglong double2ulonglong(double d)
 #ifdef _CUSTOMCONFIG_
 #include <custom_conf.h>
 #else
+#ifndef CMAKE_CONFIGD
 #define DEFAULT_MYSQL_HOME	"c:\\mysql"
-#define DATADIR         	"c:\\mysql\\data"
+#define MYSQL_DATADIR          "c:\\mysql\\data"
 #define PACKAGE			"mysql"
 #define DEFAULT_BASEDIR		"C:\\"
 #define SHAREDIR		"share"
 #define DEFAULT_CHARSET_HOME	"C:/mysql/"
 #endif
+#endif
 #ifndef DEFAULT_HOME_ENV
 #define DEFAULT_HOME_ENV MYSQL_HOME
 #endif