Add BOM artifact

Fixes bcgit#899

bom/build.gradle

@@ -0,0 +1,31 @@
+plugins {
+    id("java-platform")
+    id("maven-publish")
+}
+
+description = "BouncyCastle Bill of Materials (BOM)"
+
+dependencies {
+    constraints {
+        api(project(":core"))
+        api(project(":util"))
+        api(project(":pg"))
+        api(project(":pkix"))
+        api(project(":prov"))
+        api(project(":tls"))
+        api(project(":test"))
+        api(project(":mls"))
+        api(project(":mail"))
+        api(project(":jmail"))
+    }
+}
+
+publishing {
+    publications {
+        mavenJava(MavenPublication) {
+            groupId = 'org.bouncycastle'
+            artifactId = "bc-bom-$vmrange"
+            from components.javaPlatform
+        }
+    }
+}

build.gradle

@@ -53,7 +53,7 @@ ext {
 // this needs to go here, otherwise it can't find config
 apply plugin: 'io.spring.nohttp'
 
-allprojects {
+configure(allprojects.findAll {it.name != 'bom'}) {
     apply plugin: 'java'
     apply plugin: 'idea'
     apply plugin: 'checkstyle'
@@ -183,8 +183,7 @@ ext {
 
 }
 
-
-subprojects {
+configure(subprojects.findAll {it.name != 'bom'}) {
     apply plugin: 'eclipse'
     apply plugin: 'maven-publish'
 

settings.gradle

@@ -1,3 +1,4 @@
+include "bom"
 include "core"
 include "util"
 include "pg"