[Apple Silicon] [Test] Fix a few tests for SDK differences

Author: shahmishal

test/Driver/linker.swift

@@ -107,11 +107,11 @@
 // RUN: %swiftc_driver -driver-print-jobs -target x86_64-apple-macosx10.9 -sdk %S/Inputs/MacOSX10.15.sdk %s 2>&1 | %FileCheck -check-prefix MACOS_UNVERSIONED %s
 
 // Check arm64 macOS first deployment version adjustment.
-// RUN: %swiftc_driver -driver-print-jobs -target arm64-apple-macosx10.15.1 %s 2>&1 | %FileCheck -check-prefix ARM64E_MACOS_LINKER %s
+// RUN: %swiftc_driver -sdk "" -driver-print-jobs -target arm64-apple-macosx10.15.1 %s 2>&1 | %FileCheck -check-prefix ARM64E_MACOS_LINKER %s
 
 // Check x86 macOS 11 deployment version adjustment.
-// RUN: %swiftc_driver -driver-print-jobs -target x86_64-apple-macosx11.0 %s 2>&1 | %FileCheck -check-prefix X86_MACOS11_LINKER %s
-// RUN: %swiftc_driver -driver-print-jobs -target arm64-apple-macosx11.0 %s 2>&1 | %FileCheck -check-prefix ARM64E_MACOS_LINKER %s
+// RUN: %swiftc_driver -sdk "" -driver-print-jobs -target x86_64-apple-macosx11.0 %s 2>&1 | %FileCheck -check-prefix X86_MACOS11_LINKER %s
+// RUN: %swiftc_driver -sdk "" -driver-print-jobs -target arm64-apple-macosx11.0 %s 2>&1 | %FileCheck -check-prefix ARM64E_MACOS_LINKER %s
 
 // MACOS_10_15: -platform_version macos 10.9.0 10.15.0
 // MACOS_10_15_4: -platform_version macos 10.9.0 10.15.4