Produce binaries for 10.10 as minimal MacOs version.

build.gradle

@@ -33,7 +33,7 @@ allprojects {
      } else {
          ext.targetArgs <<
             ["host":
-                ["--sysroot=$hostSysrootDir"], 
+                ["--sysroot=$hostSysrootDir", "-mmacosx-version-min=$minMacOsVersion"], 
              "iphone":
                 ["-stdlib=libc++", "-arch", "arm64", "-isysroot", "$iphoneSysrootDir"],
 // TODO: re-enable after simulator sysroot is available in the dependencies

gradle.properties

@@ -1,4 +1,5 @@
 kotlin_version=1.1-M03
 llvmVersion = 3.9.0
+minMacOsVersion = 10.10
 #kotlinCompilerModule=org.jetbrains.kotlin:kotlin-compiler:1.1-SNAPSHOT
-kotlinCompilerModule=org.jetbrains.kotlin:kotlin-compiler:1.1-20170217.175209-427
+kotlinCompilerModule=org.jetbrains.kotlin:kotlin-compiler:1.1-20170217.175209-427