Maintenance: update Makefile.java.mk
Maintenance: update Makefile.java.mk

- Add quotes guards to protect from space in path

or-tools/or-tools,or-tools/or-tools,google/or-tools,or-tools/or-tools,google/or-tools,or-tools/or-tools,google/or-tools,or-tools/or-tools,google/or-tools,google/or-tools,or-tools/or-tools,google/or-tools