RFR: 8313576: GCC 7 reports compiler warning in bundled freetype 2.13.0 [v2]

[Sergey Bylokhov]

> One warning is disabled for the freetype.

Sergey Bylokhov has updated the pull request incrementally with two additional commits since the last revision:

 - DISABLED_WARNINGS_gcc_ftobjs.c
 - Revert "8313576: GCC 7 reports some compiler warnings in bundled freetype 2.13.0"
   
   This reverts commit 4dd2e0dc9fceddff5649b7f5d44691f53102e504.

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/15116/files
  - new: https://git.openjdk.org/jdk/pull/15116/files/4dd2e0dc..2569b126

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15116&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15116&range=00-01

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/15116.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15116/head:pull/15116

PR: https://git.openjdk.org/jdk/pull/15116