[test] Avoid xcrun in this particular test. (#3351)

It seems to be messing with environment variables.

rdar://problem/26981561

Author: jrose-apple

test/Driver/temp-files.swift

@@ -9,18 +9,18 @@
 // EMPTY-NOT: .{{(o|swiftmodule|swiftdoc)}}
 
 // RUN: rm -rf %t && mkdir -p %t/tmp/ && touch %t/tmp/dummy
-// RUN: env TMPDIR=%t/tmp/ %target-swiftc_driver -emit-executable %s -o %t/main2 -emit-module-path %t/main2.swiftmodule
+// RUN: env TMPDIR=%t/tmp/ %swiftc_driver -target %target-triple -sdk %sdk -module-cache-path %t -emit-executable %s -o %t/main2 -emit-module-path %t/main2.swiftmodule
 // RUN: ls %t/main2
 // RUN: ls %t/main2.swiftmodule
 // RUN: ls %t/tmp | FileCheck -check-prefix=EMPTY %s
 
 // RUN: rm -rf %t && mkdir -p %t/tmp/ && touch %t/tmp/dummy
-// RUN: env TMPDIR=%t/tmp/ %target-swiftc_driver -emit-executable %s -o %t/main3 -g
+// RUN: env TMPDIR=%t/tmp/ %swiftc_driver -target %target-triple -sdk %sdk -module-cache-path %t -emit-executable %s -o %t/main3 -g
 // RUN: ls %t/main3
 // RUN: ls %t/tmp | FileCheck -check-prefix=EMPTY %s
 
 // RUN: rm -rf %t && mkdir -p %t/tmp/ && touch %t/tmp/dummy
-// RUN: env TMPDIR=%t/tmp/ %target-swiftc_driver -emit-executable %s -o %t/main4 -emit-module-path %t/main4.swiftmodule -g
+// RUN: env TMPDIR=%t/tmp/ %swiftc_driver -target %target-triple -sdk %sdk -module-cache-path %t -emit-executable %s -o %t/main4 -emit-module-path %t/main4.swiftmodule -g
 // RUN: ls %t/main4
 // RUN: ls %t/main4.swiftmodule
 // RUN: ls %t | FileCheck -check-prefix=MAIN4-%target-object-format %s
@@ -31,7 +31,7 @@
 
 // RUN: rm -rf %t && mkdir -p %t/tmp/ && touch %t/tmp/dummy
 // RUN: echo "{\"%s\": {\"object\": \"%t/main5.o\"}}" > %t.json
-// RUN: env TMPDIR=%t/tmp/ %target-swiftc_driver -emit-executable %s -o %t/main5 -output-file-map %t.json -g
+// RUN: env TMPDIR=%t/tmp/ %swiftc_driver -target %target-triple -sdk %sdk -module-cache-path %t -emit-executable %s -o %t/main5 -output-file-map %t.json -g
 // RUN: ls %t/main5
 // RUN: ls %t/main5.o
 // RUN: ls %t | FileCheck -check-prefix=MAIN5-%target-object-format %s
@@ -41,7 +41,7 @@
 // MAIN5-elf-NOT: .dSYM
 
 // RUN: rm -rf %t && mkdir -p %t/tmp/ && touch %t/tmp/dummy
-// RUN: env TMPDIR=%t/tmp/ %target-swiftc_driver -emit-executable %s -o %t/main6 -g -save-temps
+// RUN: env TMPDIR=%t/tmp/ %swiftc_driver -target %target-triple -sdk %sdk -module-cache-path %t -emit-executable %s -o %t/main6 -g -save-temps
 // RUN: ls %t/main6
 // RUN: ls %t | FileCheck -check-prefix=MAIN6-%target-object-format %s
 // RUN: ls %t/tmp | FileCheck -check-prefix=SAVE-TEMPS %s