Disallow input file write access to jdigen.py

jdigen.py does not need write access to its input file.
This is especially important in environments where
the source is read-only.

Fixes: 158693674
Test: lunch aosp_arm64 && make -j out/soong/.intermediates/external/oj-libjdwp/jdi_generated_properties/gen/jdi.java
Change-Id: Ic41debc8760df2f6e9df4c959d013361d0606eae
(cherry picked from commit 091ceb2bb2d4af87e3eb4ccdcfff3ad41db025ca)
1 file changed