Merge version 6.3.0-14+rpi1 and 6.3.0-16 to produce 6.3.0-16+rpi1

diff --cc debian/changelog
index 17096392243706c69f2b1d148e8ad295fccbcfd8,ecb480a47aed2a839291c05c66433a0f06f33ca0..8ce1354a741da4441749bd8f91369cab58489e2f
--- 1/debian/changelog
--- 2/debian/changelog
+++ b/debian/changelog
@@@ -1,9 -1,12 +1,19 @@@
- gcc-6 (6.3.0-14+rpi1) stretch-staging; urgency=medium
++gcc-6 (6.3.0-16+rpi1) stretch-staging; urgency=medium
 +
 +  [changes brought forward from 6.1.1-1+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Wed, 11 May 2016 20:56:09 +0000]
 +  * Disable testsuite.
 +
-  -- Raspbian forward porter <root@raspbian.org>  Wed, 26 Apr 2017 14:32:36 +0000
++ -- Raspbian forward porter <root@raspbian.org>  Thu, 18 May 2017 21:50:42 +0000
++
+ gcc-6 (6.3.0-16) unstable; urgency=medium
+ 
+   * Update to SVN 20170425 (r247223) from the gcc-6-branch.
+     - Fix PR tree-optimization/80426, PR target/80462 (AVR),
+       PR target/79453 (AVR), PR fortran/80361.
+   * libstdc++6: add Breaks: libsigc++-2.0-0c2a (<= 2.4.1-1+b1). Closes: #861060.
+   * Fix PR middle-end/80533 (wrong code), taken from the trunk. LP: #1685385.
+ 
+  -- Matthias Klose <doko@debian.org>  Sun, 30 Apr 2017 15:47:47 +0700
  
  gcc-6 (6.3.0-14) unstable; urgency=medium