[compiler-rt] Bump deployment target in tests

On Darwin, libc++ is the default C++ stdlib now, and that requires
a deployment target of at least 10.7.

Author: ldionne

compiler-rt/test/builtins/TestCases/Darwin/os_version_check_test.c

@@ -1,4 +1,4 @@
-// RUN: %clang %s -o %t -mmacosx-version-min=10.6 -framework CoreFoundation -DMAJOR=%macos_version_major -DMINOR=%macos_version_minor -DSUBMINOR=%macos_version_subminor
+// RUN: %clang %s -o %t -mmacosx-version-min=10.7 -framework CoreFoundation -DMAJOR=%macos_version_major -DMINOR=%macos_version_minor -DSUBMINOR=%macos_version_subminor
 // RUN: %run %t
 
 int __isOSVersionAtLeast(int Major, int Minor, int Subminor);

compiler-rt/test/builtins/TestCases/Darwin/os_version_check_test_no_core_foundation.c

@@ -1,11 +1,10 @@
-// RUN: %clang %s -o %t -mmacosx-version-min=10.6
+// RUN: %clang %s -o %t -mmacosx-version-min=10.7
 // RUN: %run %t
 
 int __isOSVersionAtLeast(int Major, int Minor, int Subminor);
 
 int main() {
-  // When CoreFoundation isn't linked, we expect the system version to be 0, 0,
-  // 0.
+  // When CoreFoundation isn't linked, we expect the system version to be 0, 0, 0.
   if (__isOSVersionAtLeast(1, 0, 0))
     return 1;
   return 0;

compiler-rt/test/builtins/TestCases/Darwin/platform_version_check_test.c

@@ -1,4 +1,4 @@
-// RUN: %clang %s -o %t -mmacosx-version-min=10.6 -framework CoreFoundation -DMAJOR=%macos_version_major -DMINOR=%macos_version_minor -DSUBMINOR=%macos_version_subminor
+// RUN: %clang %s -o %t -mmacosx-version-min=10.7 -framework CoreFoundation -DMAJOR=%macos_version_major -DMINOR=%macos_version_minor -DSUBMINOR=%macos_version_subminor
 // RUN: %run %t
 
 typedef int int32_t;