Move the committed changes into a new release entry

debian/changelog

@@ -1,3 +1,9 @@
+llvm-toolchain-7 (1:7~+rc3-4) UNRELEASED; urgency=medium
+
+  * libc++-7-dev doesn't provide libstdc++-dev anymore (Closes: #908738)
+
+ -- Sylvestre Ledru <sylvestre@debian.org>  Thu, 13 Sep 2018 15:26:41 +0200
+
 llvm-toolchain-7 (1:7~+rc3-3) unstable; urgency=medium
 
   [ John Paul Adrian Glaubitz ]
@@ -267,6 +273,21 @@ llvm-toolchain-snapshot (1:7~svn322880-1) unstable; urgency=medium
 
  -- Sylvestre Ledru <sylvestre@debian.org>  Thu, 18 Jan 2018 20:50:03 +0100
 
+llvm-toolchain-6.0 (1:6.0.1-8) unstable; urgency=medium
+
+  [ John Paul Adrian Glaubitz ]
+  * Fix inverted logic in ifeq statement for POLLY_ENABLE (Closes: #908646)
+
+  [ Gianfranco Costamagna ]
+  * Fixup the polly installation failure where polly is not built
+  * Add s390x to polly architectures
+  * Fix typo in rules file
+
+  [ Sylvestre Ledru ]
+  * Disable sse2 on pentium4 arch (Closes: #632472)
+
+ -- Sylvestre Ledru <sylvestre@debian.org>  Thu, 13 Sep 2018 10:04:42 +0200
+
 llvm-toolchain-snapshot (1:6.0~svn321385-1) unstable; urgency=medium
 
   * Snapshot upload before rc1 (January)

debian/control

@@ -548,7 +548,7 @@ Section: libdevel
 Architecture: any
 Multi-Arch: same
 Depends: libc++1-7 (= ${binary:Version}), ${misc:Depends}
-Provides: libstdc++-dev, libc++-dev
+Provides: libc++-dev
 Breaks: libc++-dev (<< 7~+rc1-1~exp1)
 Replaces: libc++-dev (<< 7~+rc1-1~exp1)
 Description: LLVM C++ Standard library (development files)