[repo] Migrate Groovy build scripts to use 'sourcesJar()' directly from buildSrc

libraries/stdlib/common/build.gradle

@@ -66,7 +66,7 @@ jar {
     manifestAttributes(manifest, project, 'Main')
 }
 
-configureSourcesJar()
+RepoArtifacts.sourcesJar(project)
 RepoArtifacts.javadocJar(project)
 
 sourcesJar.dependsOn(":prepare:build.version:writeStdlibVersion")

libraries/stdlib/jdk7/build.gradle

@@ -5,7 +5,7 @@ apply plugin: 'kotlin'
 JvmToolchain.configureJvmToolchain(project, JdkMajorVersion.JDK_1_8)
 
 configurePublishing(project)
-configureSourcesJar()
+RepoArtifacts.sourcesJar(project)
 RepoArtifacts.javadocJar(project)
 
 sourceSets {

libraries/stdlib/jdk8/build.gradle

@@ -3,7 +3,7 @@ description = 'Kotlin Standard Library JDK 8 extension'
 apply plugin: 'kotlin'
 
 configurePublishing(project)
-configureSourcesJar()
+RepoArtifacts.sourcesJar(project)
 RepoArtifacts.javadocJar(project)
 
 dependencies {

libraries/stdlib/jvm/build.gradle

@@ -10,7 +10,7 @@ JvmToolchain.configureJvmToolchain(project, JdkMajorVersion.JDK_1_8)
 
 configurePublishing(project)
 RepoArtifacts.javadocJar(project)
-configureSourcesJar()
+RepoArtifacts.sourcesJar(project)
 
 configurations {
     distSources