Replace \ with / in JAVA_HOME

Author: nicksieger

inc/Makefile-conf.mk

@@ -31,15 +31,16 @@ OBJECTFILES = ${OBJECTDIR}/argparser.o		\
 	      ${OBJECTDIR}/jrubyexe.o
 
 ifdef JAVA_HOME
-INCLUDES = -I${JAVA_HOME}/include
+JAVA_INCLUDE = $(subst \,/,${JAVA_HOME})/include
+INCLUDES = -I${JAVA_INCLUDE}
 endif
 
 ifdef MINGW
 OBJECTFILES += ${OBJECTDIR}/utilsfuncswin.o	\
 	       ${OBJECTDIR}/platformlauncher.o	\
 	       ${OBJECTDIR}/jvmlauncher.o	\
 	       ${OBJECTDIR}/jruby.o
-INCLUDES += -I${JAVA_HOME}/include/win32
+INCLUDES += -I${JAVA_INCLUDE}/win32
 else
 OBJECTFILES += ${OBJECTDIR}/unixlauncher.o
 endif