Fixed version summary extraction from CHANGELOG.md

Vesion summary extraction was only reading the first section
of the version (e.g bug fixes) from the changelog and when creating
the commit message since all headings started with hash / pound
they would be treated as comments by git and stripped from the
message.

Change-Id: I6469c8fee4c4b3337ef5c539d31ac0ef3ce82992

Author: Stewart Miles

build.gradle

@@ -1622,10 +1622,14 @@ task gitAddReleaseFilesToStaging(type: Exec, dependsOn: releasePlugin) {
  */
 String readVersionSummaryFromChangelog() {
   String versionSummary = ""
+  Boolean foundVersion = false
   for (String line in project.ext.changelog.text.tokenize("\n")) {
     String trimmedLine = line.trim()
-    if (line.isEmpty()) break
-    versionSummary += line + "\n"
+    if (line =~ /^# Version/) {
+      if (foundVersion) break
+      foundVersion = true
+    }
+    versionSummary += line.replace("#", "-") + "\n"
   }
   return versionSummary
 }