add a driver test for mixed ordering of fdepscan-prefix-map formats

(cherry picked from commit f0ed1e5)

Author: sina-mahdavi

clang/test/Driver/fdepscan-prefix-map-sdk.c

@@ -5,4 +5,4 @@
 
 // RUN: %clang -fdepscan-prefix-map-sdk=/^sdk -isysroot /sys/path -### %s 2>&1 | FileCheck %s
 // RUN: %clang -fdepscan-prefix-map-sdk=/^sdk --sysroot /sys/path -### %s 2>&1 | FileCheck %s
-// CHECK: -fdepscan-prefix-map=/sys/path=/^sdk
+// CHECK: "-fdepscan-prefix-map" "/sys/path" "/^sdk"

clang/test/Driver/fdepscan-prefix-map-toolchain.c

@@ -8,8 +8,8 @@
 // RUN: %clang -fdepscan-prefix-map-toolchain=/^tc -resource-dir /tc/lib/clang/10 -### %s 2>&1 | FileCheck %s
 // RUN: %clang -fdepscan-prefix-map-toolchain=/^tc -resource-dir /tc/usr/lib/clang/10 -### %s 2>&1 | FileCheck %s
 
-// CHECK: -fdepscan-prefix-map=/tc=/^tc
+// CHECK: "-fdepscan-prefix-map" "/tc" "/^tc"
 
 // Implicit resource-dir
 // RUN: %clang -fdepscan-prefix-map-toolchain=/^tc -### %s 2>&1 | FileCheck %s -check-prefix=CHECK_IMPLICIT
-// CHECK_IMPLICIT: -fdepscan-prefix-map={{.*}}=/^tc
+// CHECK_IMPLICIT: "-fdepscan-prefix-map" "{{.*}}" "/^tc"

clang/test/Driver/fdepscan-prefix-map.c

@@ -4,5 +4,8 @@
 // RUN: not %clang -fdepscan-prefix-map=/=/^bad -### %s 2>&1 | FileCheck %s -check-prefix=INVALID
 // INVALID: error: invalid argument '{{.*}}/^bad' to -fdepscan-prefix-map=
 
-// RUN: %clang -fdepscan-prefix-map=/good=/^good -### %s 2>&1 | FileCheck %s
-// CHECK: "-fdepscan-prefix-map=/good=/^good"
+// RUN: %clang -fdepscan-prefix-map=/good=/^good -### %s 2>&1 | FileCheck --check-prefix CHECK_CORRECT %s
+// CHECK_CORRECT: "-fdepscan-prefix-map" "/good" "/^good"
+
+// RUN %clang -fdepscan-prefix-map=/a=/^a -fdepscan-prefix-map /b /^b -fdepscan-prefix-map=/c=/^c -fdepscan-prefix-map /d /^d -### %s 2>&1 | FileCheck --check-prefix=CHECK_MIXED %s
+// CHECK_MIXED: "-fdepscan-prefix-map" "/a" "/^a" "-fdepscan-prefix-map" "/b" "/^b" "-fdepscan-prefix-map" "/c" "/^c" "-fdepscan-prefix-map" "/d" "/^d"