vndk-def: Add regex support to extra deps format

This commit adds regular expression matching and ${LIB} substitution to
extra deps file format (`--load-extra-deps`).

Test: ./tests/test_elf_linker.py
Test: ./tests/run.py
Change-Id: I9393d3de50a80adc0d0a947ada8c7197d364e48e
4 files changed