Merge pull request #2353 from aciidb0mb3r/add-env-linux-x86-64

[Build] Add -gnu in x86_64 Linux's triple

Author: aciidgh

Sources/Build/Triple.swift

@@ -122,7 +122,7 @@ public struct Triple: Encodable {
     }
 
     public static let macOS = try! Triple("x86_64-apple-macosx")
-    public static let x86_64Linux = try! Triple("x86_64-unknown-linux")
+    public static let x86_64Linux = try! Triple("x86_64-unknown-linux-gnu")
     public static let i686Linux = try! Triple("i686-unknown-linux")
     public static let ppc64leLinux = try! Triple("powerpc64le-unknown-linux")
     public static let s390xLinux = try! Triple("s390x-unknown-linux")

Utilities/bootstrap

@@ -1045,7 +1045,7 @@ def main():
         build_target = "x86_64-apple-macosx"
     elif platform.system() == 'Linux':              
         if platform.machine() == 'x86_64':
-            build_target = "x86_64-unknown-linux"
+            build_target = "x86_64-unknown-linux-gnu"
         elif platform.machine() == "i686":
             build_target = "i686-unknown-linux"
         elif platform.machine() == 's390x':