Updating diagnostic message

Author: LucianoPAlmeida

include/swift/AST/DiagnosticsDriver.def

@@ -115,8 +115,8 @@ ERROR(error_ios_maximum_deployment_32,none,
       "iOS %0 does not support 32-bit programs", (unsigned))
 
 WARNING(warn_arclite_not_found_when_link_objc_runtime,none,
-      "Unable to find Objective-C runtime support library 'arclite'. "
-      "consider '-no-link-objc-runtime' flag", ())
+        "unable to find Objective-C runtime support library 'arclite'; "
+        "pass '-no-link-objc-runtime' to silence this warning", ())
 
 ERROR(error_two_files_same_name,none,
       "filename \"%0\" used twice: '%1' and '%2'",

test/Driver/options-interpreter.swift

@@ -28,7 +28,7 @@
 // CHECK-L2: # DYLD_LIBRARY_PATH={{/foo/:/bar/:[^:]+/lib/swift/macosx$}}
 
 // RUN: env DYLD_LIBRARY_PATH=/abc/ SDKROOT=/sdkroot %swift_driver_plain -### -target x86_64-apple-macosx10.9 -L/foo/ -L/bar/ %s 2>&1 | %FileCheck -check-prefix=CHECK-L2-ENV %s 
-// CHECK-L2-ENV: warning: Unable to find Objective-C runtime support library 'arclite'. consider '-no-link-objc-runtime' flag
+// CHECK-L2-ENV: warning: unable to find Objective-C runtime support library 'arclite'; pass '-no-link-objc-runtime' to silence this warning
 // CHECK-L2-ENV: # DYLD_LIBRARY_PATH={{/foo/:/bar/:[^:]+/lib/swift/macosx:/sdkroot/usr/lib/swift:/abc/$}}
 
 // RUN: %swift_driver -### -target x86_64-apple-macosx10.9 %s | %FileCheck -check-prefix=CHECK-NO-FRAMEWORKS %s
@@ -53,7 +53,7 @@
 // CHECK-F2-ENV: DYLD_FRAMEWORK_PATH=/foo/:/bar/:/abc/{{$}}
 
 // RUN: env DYLD_FRAMEWORK_PATH=/abc/ SDKROOT=/sdkroot %swift_driver_plain -### -target x86_64-apple-macosx10.9 -F/foo/ -F/bar/ -L/foo2/ -L/bar2/ %s 2>&1 | %FileCheck -check-prefix=CHECK-COMPLEX %s
-// CHECK-COMPLEX: warning: Unable to find Objective-C runtime support library 'arclite'. consider '-no-link-objc-runtime' flag
+// CHECK-COMPLEX: warning: unable to find Objective-C runtime support library 'arclite'; pass '-no-link-objc-runtime' to silence this warning
 // CHECK-COMPLEX: -F /foo/
 // CHECK-COMPLEX: -F /bar/
 // CHECK-COMPLEX: #