2018-03-29, Version 4.9.1 'Argon' (Maintenance)

Notable changes:

No additional commits.

Due to incorrect staging of the upgrade to the GCC 4.9.X compiler, the
latest releases for PPC little endian were built using GCC 4.9.X
instead of GCC 4.8.X. This caused an ABI breakage on PPCLE based
environments. This has been fixed in our infrastructure and we are
doing this release to ensure that the hosted binaries are adhering to
our platform support contract.

PR-URL: #19681

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Node.js ChangeLog
 
+## 2018-03-29, Version 4.9.1 'Argon' (Maintenance), @MylesBorins
+
+### Notable Changes
+
+No additional commits.
+
+Due to incorrect staging of the upgrade to the GCC 4.9.X compiler, the latest releases for PPC little
+endian were built using GCC 4.9.X instead of GCC 4.8.X. This caused an ABI breakage on PPCLE based
+environments. This has been fixed in our infrastructure and we are doing this release to ensure that
+the hosted binaries are adhering to our platform support contract.
+
 ## 2018-03-28, Version 4.9.0 'Argon' (Maintenance), @MylesBorins
 
 This is a security release. All Node.js users should consult the security release summary at https://nodejs.org/en/blog/vulnerability/march-2018-security-releases/ for details on patched vulnerabilities.

src/node_version.h

@@ -8,7 +8,7 @@
 #define NODE_VERSION_IS_LTS 1
 #define NODE_VERSION_LTS_CODENAME "Argon"
 
-#define NODE_VERSION_IS_RELEASE 0
+#define NODE_VERSION_IS_RELEASE 1
 
 #ifndef NODE_STRINGIFY
 #define NODE_STRINGIFY(n) NODE_STRINGIFY_HELPER(n)