man: Move compiler flags subsection from ENVIRONMENT to NOTES

debian/changelog

@@ -19,6 +19,7 @@ dpkg (1.17.0) UNRELEASED; urgency=low
     - Rename CAVEATS sections to NOTES.
     - Fold BACKWARD COMPATIBILITY section into other sections.
     - Document since when DEB_*_MULTIARCH variables are supported.
+    - Move compiler flags subsection from ENVIRONMENT to NOTES.
   * Use colon instead of dot for user:group in dpkg debug output.
   * Remove support for obsolete DM-Upload-Allowed from Dpkg::Vendor::Debian.
   * Fix update-alternatives to use the current alternative link as the first

man/dpkg-buildpackage.1

@@ -259,13 +259,13 @@ respective interface to retrieve the needed values.
 \fBdpkg\-architecture\fP is called with the \fB\-a\fP and \fB\-t\fP
 parameters forwarded. Any variable that is output by its \fB\-s\fP
 option is integrated in the build environment.
+.
+.SH NOTES
 .SS Compiler flags are no longer exported
 Between versions 1.14.17 and 1.16.1, \fBdpkg\-buildpackage\fP
 exported compiler flags (\fBCFLAGS\fP, \fBCXXFLAGS\fP, \fBFFLAGS\fP,
 \fBCPPFLAGS\fP and \fBLDFLAGS\fP) with values as returned
 by \fBdpkg\-buildflags\fP. This is no longer the case.
-.
-.SH NOTES
 .SS Default build targets
 \fBdpkg\-buildpackage\fP is using the \fBbuild\-arch\fP and
 \fBbuild\-indep\fP targets since version 1.16.2. Those targets are thus