get mkdir.btm from it's new location

solenv/inc/unitools.mk

@@ -21,7 +21,7 @@ FIND*=$(BUILD_TOOLS)$/find.exe
 LS*=$(BUILD_TOOLS)$/ls.exe
 GNUCOPY*=$(BUILD_TOOLS)$/cp.exe
 #wraper for solenv\bin\mkdir.pl to fix mkdir /p problem
-MKDIR=+$(BUILD_TOOLS)$/mkdir.btm
+MKDIR=+$(SOLARENV)$/bin$/mkdir.btm
 TOUCH*=$(BUILD_TOOLS)$/touch.exe
 PERL*=$(BUILD_TOOLS)$/perl.exe
 #signing for win32 only