[MacOS] Create installer disk image manually to workaround broken hdiutil

Summary:
Apple broke the hdiutil on MacOS 10.13. If one passes multiple -srcfolder
arguments, it dead locks with 100 % CPU forever. Since there is no way to
tell Bitrock to use only one -srcfolder argument, we have to go the
advanced way and create the disk image file manually. This also allows
us to customize it more in the future.

Reviewers: #swift_pilot_client, msutcliffe

Reviewed By: #swift_pilot_client, msutcliffe

Subscribers: jenkins

Maniphest Tasks: T181

Differential Revision: https://dev.swift-project.org/D58

installer/installbuilder/project.xml

@@ -6,6 +6,11 @@
     <leftImage>../images/leftimage.png</leftImage>
     <logoImage>../images/logo.png</logoImage>
     <splashImage>../images/splashscreen.png</splashImage>
+    <functionDefinitionList>
+        <include>
+            <file>createbundledmg.xml</file>
+        </include>
+    </functionDefinitionList>
     <requireInstallationByRootUser>0</requireInstallationByRootUser>
     <componentList>
         <include>
@@ -21,6 +26,18 @@
             <file>vcredist.xml</file>
         </include>
     </componentList>
+    <postBuildActionList>
+        <createBundleDmg>
+            <dmgIconPosition>186, 186</dmgIconPosition>
+            <dmgIconSize>128</dmgIconSize>
+            <dmgWindowBounds>400, 100, 765, 465</dmgWindowBounds>
+            <ruleList>
+                <platformTest>
+                    <type>osx</type>
+                </platformTest>
+            </ruleList>
+        </createBundleDmg>
+    </postBuildActionList>
     <postInstallationActionList>
         <createDirectory>
             <path>/usr/local/var/lib/dbus</path>
@@ -108,7 +125,7 @@
     <compressionAlgorithm>lzma</compressionAlgorithm>
 
     <!-- Generate a DMG for OSX Installer -->
-    <createOsxBundleDmg>1</createOsxBundleDmg>
+    <createOsxBundleDmg>0</createOsxBundleDmg>
 
     <!--  <allowedLanguages>en fr es it de ja nl ru zh_CN no pt_BR</allowedLanguages> -->
     <enableRollback>0</enableRollback>