Add RPATH to shared libraries

Fixes libfontconfig.so not being able to find libfreetype_harfbuzz.so:

$ ldd libfontconfig.so | grep freetype_harfbuzz
	libfreetype_harfbuzz.so => not found
$ ls libfreetype_harfbuzz.so
libfreetype_harfbuzz.so

R=thakis

Bug: 911836,912366
Change-Id: Ia0aaed8fc2c745b02cecf9ee3ce9888c1d8ccf77
Reviewed-on: https://chromium-review.googlesource.com/c/1362457
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#614255}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 3b3db14346589ff4069d004883b52d0a01690fe5
2 files changed