Fix a few tests for implicit _Concurrency import on Linux

Author: DougGregor

test/IRGen/ELF-remove-autolink-section.swift

@@ -1,11 +1,11 @@
-// RUN: %swiftc_driver -emit-ir %s -o - | %FileCheck %s -check-prefix ELF
+// RUN: %swiftc_driver -emit-ir %s -o - -Xfrontend -disable-implicit-concurrency-module-import | %FileCheck %s -check-prefix ELF
 
 // Check that the swift auto link section is available in the object file.
-// RUN: %swiftc_driver -c %s -o %t
+// RUN: %swiftc_driver -c %s -o %t -Xfrontend -disable-implicit-concurrency-module-import
 // RUN: llvm-readelf %t -S | %FileCheck %s -check-prefix SECTION
 
 // Checks that the swift auto link section is removed from the final binary.
-// RUN: %swiftc_driver  -emit-executable %s -o %t
+// RUN: %swiftc_driver  -emit-executable %s -o %t -Xfrontend -disable-implicit-concurrency-module-import
 // RUN: llvm-readelf %t -S | %FileCheck %s -check-prefix NOSECTION
 
 // REQUIRES: OS=linux-gnu

test/SourceKit/Indexing/index_is_test_candidate.swift

@@ -1,4 +1,4 @@
-// RUN: %sourcekitd-test -req=index %s -- -Xfrontend -serialize-diagnostics-path -Xfrontend %t.dia %s | %sed_clean > %t.response
+// RUN: %sourcekitd-test -req=index %s -- -Xfrontend -serialize-diagnostics-path -Xfrontend %t.dia %s -Xfrontend -disable-implicit-concurrency-module-import | %sed_clean > %t.response
 // RUN: %diff -u %s.response %t.response
 
 // This test verifies that, when Objective-C interop is disabled, private